[go: up one dir, main page]

WO2019125141A1 - Mobile platform and method for applying a composition to a skin of a mobile platform - Google Patents

Mobile platform and method for applying a composition to a skin of a mobile platform Download PDF

Info

Publication number
WO2019125141A1
WO2019125141A1 PCT/NL2018/050842 NL2018050842W WO2019125141A1 WO 2019125141 A1 WO2019125141 A1 WO 2019125141A1 NL 2018050842 W NL2018050842 W NL 2018050842W WO 2019125141 A1 WO2019125141 A1 WO 2019125141A1
Authority
WO
WIPO (PCT)
Prior art keywords
mobile platform
composition
fluid
skin
separation device
Prior art date
Application number
PCT/NL2018/050842
Other languages
French (fr)
Inventor
Ericus Rudolf VAN ULDEN
Original Assignee
Epic Holding B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Epic Holding B.V. filed Critical Epic Holding B.V.
Publication of WO2019125141A1 publication Critical patent/WO2019125141A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C23/00—Influencing air flow over aircraft surfaces, not otherwise provided for
    • B64C23/005—Influencing air flow over aircraft surfaces, not otherwise provided for by other means not covered by groups B64C23/02 - B64C23/08, e.g. by electric charges, magnetic panels, piezoelectric elements, static charges or ultrasounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/06—Boundary layer controls by explicitly adjusting fluid flow, e.g. by using valves, variable aperture or slot areas, variable pump action or variable fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/16—Boundary layer controls by blowing other fluids over the surface than air, e.g. He, H, O2 or exhaust gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/22—Boundary layer controls by using a surface having multiple apertures of relatively small openings other than slots
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/10—Drag reduction

Definitions

  • the present patent application relates to a mobile platform and method for applying a composition to a skin of a mobile platform.
  • the present patent application provides a mobile platform, wherein the mobile platform comprises a skin, wherein the skin is provided with a plurality of openings, wherein the mobile platform comprises a separation device configured to separate one or more components from a fluid surrounding the mobile platform, and wherein the mobile platform is configured to form a composition of the separated components and to apply the composition via the openings to an outer side of the skin, wherein the composition to be applied differs from a composition of the fluid surrounding the mobile platform.
  • the mobile platform applies a layer all around the skin via the plurality of openings in the skin, wherein the layer has a composition which differs from the fluid surrounding the mobile platform.
  • the properties, such as the pressure, temperature, density, relative velocity and/or composition, of a layer of fluid situated close to the skin of the mobile platform hereby differ from the properties of the fluid.
  • the relative velocity is the velocity at which the fluid comes into contact with the skin of the mobile platform.
  • the friction forces are influenced by, among other things, the properties of the fluid, for instance a pressure, temperature, density, relative velocity and/or composition of the fluid.
  • the mobile platform according to the first aspect further has the advantage that use of the separation device allows the properties of the layer surrounding the mobile platform to be modified with a composition which differs from the fluid, without gas bottles or other containers of components being required for this purpose in the mobile platform.
  • the mobile platform can be an aeroplane, helicopter or other aircraft, but also a vessel or submersible craft.
  • the mobile platform is preferably an aircraft or a submersible craft, most preferably an aircraft.
  • “lift” or buoyancy is necessary to allow the mobile platform to maintain a stable position relative to a reference plane.
  • the reference plane can for instance be the ground level or the sea level.
  • This buoyancy can also be influenced by properties of the surrounding fluid, for instance a pressure, temperature, density, relative velocity and/or composition of the fluid.
  • Application of a layer all around the mobile platform with properties differing from those of the fluid will therefore also change the lift or the buoyancy, which can result in ascent or descent of the mobile platform.
  • Particularly in the case of aircraft can search and ascent take place without additional power of for instance (jet) engines being necessary for this purpose.
  • the mobile platform preferably comprises a pump for pumping the separated composition to and through openings of the skin.
  • the composition is gaseous or liquid.
  • the openings preferably have a diameter in a range of 30 pm-l0 mm, more preferably 60 pm-500 pm.
  • the skin of the mobile platform is preferably manufactured using additive manufacturing, i.e. 3D printing.
  • the openings and channels for supplying the composition to the openings can hereby be arranged integrally in the skin, whereby weight can be saved.
  • the separation device is preferably a membrane separation device.
  • the membrane separation device more preferably comprises hollow membrane fibres.
  • the membrane can be a nitrogen membrane or an oxygen membrane, whereby the retentate comprises respectively an increased concentration of oxygen or an increased
  • the mobile platform preferably comprises an inlet for admitting the fluid and preferably a compressor for increasing the pressure of the admitted fluid, wherein the mobile platform is configured to supply the fluid with the increased pressure to the separation device.
  • a device without compressor is possible when the inlet is formed such that, due to the relative velocity of the fluid entering the inlet, an increased pressure of the fluid being carried to the separation device is brought about.
  • the compressor is for instance suitable for increasing the pressure to 5, 7 or 10 bar. Such pressures are also particularly suitable for application with a membrane separation device.
  • the mobile platform is preferably an aircraft, wherein the compressor is an axial compressor. It is particularly in the case of aircraft that application of the layer via the openings can reduce both the frictional resistance and bring about a modification of the“lift” or the buoyancy. In respect of the frictional resistance, the flow profile of the fluid around the aircraft can for instance be modified. Use of components with a density differing from that of air also enables the density to be modified locally, close to the skin, whereby the frictional resistance will also change.
  • the separation device is preferably configured to separate the oxygen and nitrogen.
  • the composition formed by the one or more separated components preferably comprises more nitrogen than the air surrounding the aeroplane.
  • the composition more preferably comprises substantially nitrogen. (Unavoidable) impurities can further occur in this composition.
  • substantially nitrogen facilitates the configuration of the separation device, since mixing need no longer take place.
  • the nitrogen, as retentate or as permeate, depending on the membrane used, can be carried directly from the separation device to the openings in the skin.
  • the mobile platform is a vessel, wherein the fluid is water, wherein the separation device is configured to separate the fluid into water with an increased salt content and water with a reduced salt content relative to the fluid, wherein the composition is formed by the water with an increased salt content or the water with a reduced salt content.
  • the present patent application provides a method for applying a composition to a skin of a mobile platform, wherein the mobile platform moves through a fluid surrounding the mobile platform, the method comprising of:
  • composition differs from a composition of the fluid surrounding the mobile platform.
  • Fig. 1 is a schematic side view of an aeroplane with a plurality of openings and a separation device according to a preferred embodiment
  • Fig. 2 is a schematic side view of the aeroplane of Fig. 1 with the separation device in operative situation;
  • Fig. 3 is a schematic view of a layer of air at a skin of an aircraft, wherein no layer is applied to the skin;
  • Fig. 4 is a schematic view of a layer of air at a skin of an aircraft, wherein a layer of a composition with substantially nitrogen is applied to the skin;
  • Fig. 5 is a schematic view of an aeroplane with a plurality of openings and a separation device according to a further preferred embodiment.
  • An aeroplane 1 advancing in air 2 experiences frictional resistance from the relative velocity of the aeroplane 1 in relation to the air 2.
  • Aeroplane 1 comprises a skin 4 with a plurality of openings 5 therein.
  • Aeroplane 1 comprises a membrane separation device 3.
  • Membrane separation device 3 is in gas communication connection with inlet 7.
  • a layer 9 of the composition is created around aeroplane 1.
  • the thickness of the layer is exaggerated and will be many times thinner in an actual embodiment.
  • Fig. 3 shows a situation in which a layer of the composition has not been applied to skin 4.
  • the relative movement of the air in relation to skin 4 is indicated with arrows A.
  • Schematically shown is a composition of oxygen and nitrogen, wherein the oxygen is represented as a sphere with a greater diameter than a sphere designating the nitrogen.
  • the crosses R indicate where a boundary layer is situated between the skin and the surrounding air.
  • a layer 9 has been arranged via opening 50 of the plurality of openings 5 all around the skin 4 of the aeroplane.
  • a diameter of opening 50 is indicated with the arrow d, and is for instance 100 pm.
  • the boundary layer as indicated with the crosses R is now situated further away from the skin.
  • the flow velocity of layer 9 will differ from that of the air originally surrounding the skin.
  • layer 9 will also begin to flow along, the frictional resistance decreases.
  • layer 9 comprises substantially oxygen.
  • layer 9 comprises substantially nitrogen.
  • Fig. 5 shows an embodiment of a system 10 with a skin 4 and membrane separation device 3.
  • the system comprises an inlet 7 into which air surrounding the aeroplane flows, as indicated with arrow C.
  • the admitted air is optionally compressed in compressor 11 , for instance to a pressure in a range of 4-10 bar, for instance 5, 7 or 8 bar.
  • Compressor 11 can be an axial compressor.
  • membrane separation device 3 comprises a plurality of hollow membrane fibres shown as single membrane 12, inside which the pressure of for instance 7 bar prevails at an inlet 13 of membrane separation device 3. A lower pressure prevails on an outer side 14 of the hollow membrane fibres. A driving force for separating the components of air is provided by the pressure difference between inner side 13 and outer side 14 of the membrane fibres.
  • the components of the inlet air comprise oxygen and nitrogen, in concentrations of respectively about 21% and 78%.
  • the hollow membrane fibres can have oxygen membranes or nitrogen membranes as their wall. When nitrogen membranes are used, nitrogen will be the permeate and will be discharged via the discharge 16. When oxygen membranes are used, as shown in Fig. 5, oxygen will be the permeate and nitrogen will be discharged from membrane separation device 3 as retentate. Nitrogen will be discharged from membrane separation device 3 as retentate via discharge 18. The discharge of the nitrogen can take place in controllable manner using a valve 20, for instance a controllable solenoid valve.
  • the oxygen or the nitrogen, and/or other components of air, such as argon or water, are used to make a composition which is discharged to openings 5 via conduits 22.
  • the composition has a composition differing from that of air.
  • a composition with an increased concentration of oxygen can for instance be carried to the openings 50 of the plurality of openings 5, for instance 80% oxygen and 19-20% nitrogen.
  • a mixing device can for instance be used for this purpose.
  • Another option is to configure the separating device such that for instance the retentate comprises 80% oxygen, in which roughly 19-20% nitrogen has remained. It is also possible to envisage a composition of substantially oxygen or substantially nitrogen, wherein a mixing device need not be used.
  • the mobile platform is an underwater vessel.
  • the fluid is water and the separating device is configured to separate the fluid into water with an increased salt content and water with a reduced salt content relative to the fluid, wherein the composition is formed by the water with an increased salt content or the water with a reduced salt content.
  • the buoyancy of the vessel can be modified by modification of the local salt concentration. Furthermore, spraying of the composition toward the outer side of the skin via the openings here also causes a change of the flow profile along the skin of the submersible craft, whereby a reduction in the frictional resistance can be obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The present patent document shows a method for applying a composition to a skin of a mobile platform and a mobile platform, wherein the mobile platform comprises a skin, wherein the skin is provided with a plurality of openings, wherein the mobile platform comprises a separation device configured to separate one or more components from a fluid surrounding the mobile platform, and wherein the mobile platform is configured to form a composition of the separated components and to apply the composition via the openings to an outer side of the skin, wherein the composition to be applied differs from a composition of the fluid surrounding the mobile platform.

Description

Mobile platform and method for applying a composition to a skin of a mobile platform
The present patent application relates to a mobile platform and method for applying a composition to a skin of a mobile platform.
Movement of objects through air, water or another fluid results in friction forces on the outer side or skin of the object. In order to maintain the velocity of the object these friction forces have to be overcome by the propelling power of the object.
It is an object of the present patent application to provide a mobile platform which reduces the friction forces resulting from the movement through the fluid.
According to a first aspect, the present patent application provides a mobile platform, wherein the mobile platform comprises a skin, wherein the skin is provided with a plurality of openings, wherein the mobile platform comprises a separation device configured to separate one or more components from a fluid surrounding the mobile platform, and wherein the mobile platform is configured to form a composition of the separated components and to apply the composition via the openings to an outer side of the skin, wherein the composition to be applied differs from a composition of the fluid surrounding the mobile platform.
The mobile platform applies a layer all around the skin via the plurality of openings in the skin, wherein the layer has a composition which differs from the fluid surrounding the mobile platform. The properties, such as the pressure, temperature, density, relative velocity and/or composition, of a layer of fluid situated close to the skin of the mobile platform hereby differ from the properties of the fluid. The relative velocity is the velocity at which the fluid comes into contact with the skin of the mobile platform.
The friction forces are influenced by, among other things, the properties of the fluid, for instance a pressure, temperature, density, relative velocity and/or composition of the fluid. The mobile platform according to the first aspect further has the advantage that use of the separation device allows the properties of the layer surrounding the mobile platform to be modified with a composition which differs from the fluid, without gas bottles or other containers of components being required for this purpose in the mobile platform.
The mobile platform can be an aeroplane, helicopter or other aircraft, but also a vessel or submersible craft. The mobile platform is preferably an aircraft or a submersible craft, most preferably an aircraft. When the mobile platform is surrounded by the fluid,“lift” or buoyancy is necessary to allow the mobile platform to maintain a stable position relative to a reference plane. The reference plane can for instance be the ground level or the sea level. This buoyancy can also be influenced by properties of the surrounding fluid, for instance a pressure, temperature, density, relative velocity and/or composition of the fluid. Application of a layer all around the mobile platform with properties differing from those of the fluid will therefore also change the lift or the buoyancy, which can result in ascent or descent of the mobile platform. Particularly in the case of aircraft can search and ascent take place without additional power of for instance (jet) engines being necessary for this purpose.
The mobile platform preferably comprises a pump for pumping the separated composition to and through openings of the skin. The composition is gaseous or liquid.
The openings preferably have a diameter in a range of 30 pm-l0 mm, more preferably 60 pm-500 pm.
The skin of the mobile platform is preferably manufactured using additive manufacturing, i.e. 3D printing. The openings and channels for supplying the composition to the openings can hereby be arranged integrally in the skin, whereby weight can be saved.
The separation device is preferably a membrane separation device. The membrane separation device more preferably comprises hollow membrane fibres. In applications wherein the fluid is air, the membrane can be a nitrogen membrane or an oxygen membrane, whereby the retentate comprises respectively an increased concentration of oxygen or an increased
concentration of nitrogen.
The mobile platform preferably comprises an inlet for admitting the fluid and preferably a compressor for increasing the pressure of the admitted fluid, wherein the mobile platform is configured to supply the fluid with the increased pressure to the separation device. A device without compressor is possible when the inlet is formed such that, due to the relative velocity of the fluid entering the inlet, an increased pressure of the fluid being carried to the separation device is brought about. The compressor is for instance suitable for increasing the pressure to 5, 7 or 10 bar. Such pressures are also particularly suitable for application with a membrane separation device.
The mobile platform is preferably an aircraft, wherein the compressor is an axial compressor. It is particularly in the case of aircraft that application of the layer via the openings can reduce both the frictional resistance and bring about a modification of the“lift” or the buoyancy. In respect of the frictional resistance, the flow profile of the fluid around the aircraft can for instance be modified. Use of components with a density differing from that of air also enables the density to be modified locally, close to the skin, whereby the frictional resistance will also change.
When the mobile platform is an aircraft, the fluid is air and the air comprises nitrogen and oxygen, the separation device is preferably configured to separate the oxygen and nitrogen.
The composition formed by the one or more separated components preferably comprises more nitrogen than the air surrounding the aeroplane. The composition more preferably comprises substantially nitrogen. (Unavoidable) impurities can further occur in this composition. Using substantially nitrogen facilitates the configuration of the separation device, since mixing need no longer take place. The nitrogen, as retentate or as permeate, depending on the membrane used, can be carried directly from the separation device to the openings in the skin.
In an alternative embodiment the mobile platform is a vessel, wherein the fluid is water, wherein the separation device is configured to separate the fluid into water with an increased salt content and water with a reduced salt content relative to the fluid, wherein the composition is formed by the water with an increased salt content or the water with a reduced salt content.
Applying such a composition close to the skin of a vessel enables the buoyancy of the vessel to be modified by modification the local salt concentration. Furthermore, spraying of the composition toward the outer side of the skin here also causes a change of the flow profile along the skin of the vessel, whereby a reduction in the frictional resistance can be obtained.
According to a second aspect, the present patent application provides a method for applying a composition to a skin of a mobile platform, wherein the mobile platform moves through a fluid surrounding the mobile platform, the method comprising of:
- separating one or more components of the fluid from the fluid;
- forming a composition of the separated components; and
- applying the composition to an outer side of the skin via a plurality of openings in the skin,
wherein the composition differs from a composition of the fluid surrounding the mobile platform.
Advantages and embodiments of the method will become immediately apparent on the basis of the embodiments of the mobile platform according to the first aspect, the following description of figures and/or the claims.
Further advantages, features and details of the present invention will be elucidated with reference to the following description of figures relating to a preferred embodiment thereof, in which:
Fig. 1 is a schematic side view of an aeroplane with a plurality of openings and a separation device according to a preferred embodiment;
Fig. 2 is a schematic side view of the aeroplane of Fig. 1 with the separation device in operative situation;
Fig. 3 is a schematic view of a layer of air at a skin of an aircraft, wherein no layer is applied to the skin;
Fig. 4 is a schematic view of a layer of air at a skin of an aircraft, wherein a layer of a composition with substantially nitrogen is applied to the skin; and
Fig. 5 is a schematic view of an aeroplane with a plurality of openings and a separation device according to a further preferred embodiment. An aeroplane 1 advancing in air 2 experiences frictional resistance from the relative velocity of the aeroplane 1 in relation to the air 2. Aeroplane 1 comprises a skin 4 with a plurality of openings 5 therein. Aeroplane 1 comprises a membrane separation device 3. Membrane separation device 3 is in gas communication connection with inlet 7. A gaseous mixture or composition having a composition differing from that of air exits the membrane separation device 3. This composition is supplied to openings 5 in order to apply a layer 9 of the composition to the skin 4 of aeroplane 1.
As can be seen in Fig. 2, in operative situation a layer 9 of the composition is created around aeroplane 1. The thickness of the layer is exaggerated and will be many times thinner in an actual embodiment.
The use of the layer will be further elucidated with reference to Figures 3 and 4. Fig. 3 shows a situation in which a layer of the composition has not been applied to skin 4. The relative movement of the air in relation to skin 4 is indicated with arrows A. Schematically shown is a composition of oxygen and nitrogen, wherein the oxygen is represented as a sphere with a greater diameter than a sphere designating the nitrogen. The crosses R indicate where a boundary layer is situated between the skin and the surrounding air.
In Fig. 4 a layer 9 has been arranged via opening 50 of the plurality of openings 5 all around the skin 4 of the aeroplane. A diameter of opening 50 is indicated with the arrow d, and is for instance 100 pm. The boundary layer as indicated with the crosses R is now situated further away from the skin. The flow velocity of layer 9 will differ from that of the air originally surrounding the skin. Although layer 9 will also begin to flow along, the frictional resistance decreases. In this example layer 9 comprises substantially oxygen. In another example layer 9 comprises substantially nitrogen.
Fig. 5 shows an embodiment of a system 10 with a skin 4 and membrane separation device 3. The system comprises an inlet 7 into which air surrounding the aeroplane flows, as indicated with arrow C. The admitted air is optionally compressed in compressor 11 , for instance to a pressure in a range of 4-10 bar, for instance 5, 7 or 8 bar. Compressor 11 can be an axial compressor.
The admitted and compressed air is carried into membrane separation device 3. In this embodiment membrane separation device 3 comprises a plurality of hollow membrane fibres shown as single membrane 12, inside which the pressure of for instance 7 bar prevails at an inlet 13 of membrane separation device 3. A lower pressure prevails on an outer side 14 of the hollow membrane fibres. A driving force for separating the components of air is provided by the pressure difference between inner side 13 and outer side 14 of the membrane fibres.
The components of the inlet air comprise oxygen and nitrogen, in concentrations of respectively about 21% and 78%. The hollow membrane fibres can have oxygen membranes or nitrogen membranes as their wall. When nitrogen membranes are used, nitrogen will be the permeate and will be discharged via the discharge 16. When oxygen membranes are used, as shown in Fig. 5, oxygen will be the permeate and nitrogen will be discharged from membrane separation device 3 as retentate. Nitrogen will be discharged from membrane separation device 3 as retentate via discharge 18. The discharge of the nitrogen can take place in controllable manner using a valve 20, for instance a controllable solenoid valve.
The oxygen or the nitrogen, and/or other components of air, such as argon or water, are used to make a composition which is discharged to openings 5 via conduits 22. The composition has a composition differing from that of air. A composition with an increased concentration of oxygen can for instance be carried to the openings 50 of the plurality of openings 5, for instance 80% oxygen and 19-20% nitrogen. A mixing device can for instance be used for this purpose. Another option is to configure the separating device such that for instance the retentate comprises 80% oxygen, in which roughly 19-20% nitrogen has remained. It is also possible to envisage a composition of substantially oxygen or substantially nitrogen, wherein a mixing device need not be used.
In another embodiment the mobile platform is an underwater vessel. In this embodiment the fluid is water and the separating device is configured to separate the fluid into water with an increased salt content and water with a reduced salt content relative to the fluid, wherein the composition is formed by the water with an increased salt content or the water with a reduced salt content.
By applying such a composition close to the skin of a submersible craft the buoyancy of the vessel can be modified by modification of the local salt concentration. Furthermore, spraying of the composition toward the outer side of the skin via the openings here also causes a change of the flow profile along the skin of the submersible craft, whereby a reduction in the frictional resistance can be obtained.
The present invention is not limited to the above described preferred embodiments thereof; the rights sought are defined by the following claims, within the scope of which many
modifications can be envisaged.

Claims

Claims
1. Mobile platform, wherein the mobile platform comprises a skin, wherein the skin is provided with a plurality of openings, wherein the mobile platform comprises a separation device configured to separate one or more components from a fluid surrounding the mobile platform, and wherein the mobile platform is configured to form a composition of the separated components and to apply the composition via the openings to an outer side of the skin, wherein the composition to be applied differs from a composition of the fluid surrounding the mobile platform.
2. Mobile platform according to claim 1, wherein the separation device is a membrane separation device comprising hollow membrane fibres.
3. Mobile platform according to claim 1 or 2, further comprising an inlet for admitting the fluid and a compressor for increasing the pressure of the admitted fluid, wherein the mobile platform is configured to supply the fluid with the increased pressure to the separation device.
4. Mobile platform according to claim 3, wherein the mobile platform is an aircraft, wherein the compressor is an axial compressor.
5. Mobile platform according to any one of the claims 1-4, wherein the mobile platform is an aircraft, wherein the fluid is air, wherein the air comprises nitrogen and oxygen, wherein the separation device is configured to separate the oxygen and nitrogen.
6. Mobile platform according to claim 5, wherein the composition formed by the one or more separated components comprises more nitrogen than the air surrounding the aeroplane.
7. Mobile platform according to claim 6, wherein the composition comprises substantially nitrogen.
8. Mobile platform according to any one of the claims 1-3, wherein the mobile platform is a vessel, wherein the fluid is water, wherein the separation device is configured to separate the fluid into water with an increased salt content and water with a reduced salt content relative to the fluid, wherein the composition is formed by the water with an increased salt content or the water with a reduced salt content.
9. Method for applying a composition to a skin of a mobile platform, wherein the mobile platform moves through a fluid surrounding the mobile platform, the method comprising of:
- separating one or more components of the fluid from the fluid;
- forming a composition of the separated components; and
- applying the composition to an outer side of the skin via a plurality of openings in the skin,
wherein the composition differs from a composition of the fluid surrounding the mobile platform.
10. Method according to claim 9, wherein the separating is done with a membrane separation device comprising hollow membrane fibres.
11. Method according to claim 9 or 10, further comprising of admitting the fluid surrounding the mobile platform, compressing the admitted fluid and supplying the compressed fluid to a separation device configured to perform the step of separating.
12. Method according to any one of the claims 9-11, wherein the mobile platform is an aircraft, wherein the fluid is air, wherein the air comprises nitrogen and oxygen, wherein the separation device is configured to separate the oxygen and nitrogen.
13. Method according to claim 12, wherein the composition formed by the one or more separated components comprises more nitrogen than the air surrounding the aeroplane.
14. Method according to claim 13, wherein the composition comprises substantially nitrogen.
15. Method according to any one of the claims 9-11, wherein the mobile platform is a vessel, wherein the fluid is water, wherein the separation device is configured to separate the fluid into water with an increased salt content and water with a reduced salt content relative to the fluid, wherein the composition is formed by the water with an increased salt content or the water with a reduced salt content.
PCT/NL2018/050842 2017-12-18 2018-12-14 Mobile platform and method for applying a composition to a skin of a mobile platform WO2019125141A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2020113A NL2020113B1 (en) 2017-12-18 2017-12-18 Mobile platform and method for applying a composition to a skin of a mobile platform
NL2020113 2017-12-18

Publications (1)

Publication Number Publication Date
WO2019125141A1 true WO2019125141A1 (en) 2019-06-27

Family

ID=60923876

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2018/050842 WO2019125141A1 (en) 2017-12-18 2018-12-14 Mobile platform and method for applying a composition to a skin of a mobile platform

Country Status (2)

Country Link
NL (1) NL2020113B1 (en)
WO (1) WO2019125141A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4124569A1 (en) * 2021-07-30 2023-02-01 Airbus Operations GmbH Drag reduction system for an aircraft

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480234A (en) * 1967-08-18 1969-11-25 Lockheed Aircraft Corp Method and apparatus for modifying airfoil fluid flow
US4363991A (en) * 1980-12-24 1982-12-14 Seymour Edelman Drag modification piezoelectric panels
US20060156965A1 (en) * 2005-01-19 2006-07-20 North Shore Partners Apparatus and method for reducing fluid drag on a submerged surface
EP1710156A2 (en) * 2005-04-04 2006-10-11 Lockheed Martin Corporation Conformal aero-adaptive nozzle / aftbody
US7954768B1 (en) * 2006-05-02 2011-06-07 Orbital Research Inc. Method of controlling aircraft, missiles, munitions and ground vehicles with plasma actuators

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480234A (en) * 1967-08-18 1969-11-25 Lockheed Aircraft Corp Method and apparatus for modifying airfoil fluid flow
US4363991A (en) * 1980-12-24 1982-12-14 Seymour Edelman Drag modification piezoelectric panels
US20060156965A1 (en) * 2005-01-19 2006-07-20 North Shore Partners Apparatus and method for reducing fluid drag on a submerged surface
EP1710156A2 (en) * 2005-04-04 2006-10-11 Lockheed Martin Corporation Conformal aero-adaptive nozzle / aftbody
US7954768B1 (en) * 2006-05-02 2011-06-07 Orbital Research Inc. Method of controlling aircraft, missiles, munitions and ground vehicles with plasma actuators

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4124569A1 (en) * 2021-07-30 2023-02-01 Airbus Operations GmbH Drag reduction system for an aircraft
US20230029560A1 (en) * 2021-07-30 2023-02-02 Airbus Operations Gmbh Drag reduction system for an aircraft

Also Published As

Publication number Publication date
NL2020113B1 (en) 2019-06-25

Similar Documents

Publication Publication Date Title
EP3034409B1 (en) Aircraft fuel deoxygenation system
EP2717997B1 (en) Fluid separation assembly and method
US9623369B2 (en) Hollow fiber apparatus and use thereof for fluids separations and heat and mass transfers
US9566553B2 (en) Fluid separation assembly and method
US20160208759A1 (en) Centrifugal fuel pump with variable pressure control
US12173730B2 (en) Brine dispersal system
WO2019125141A1 (en) Mobile platform and method for applying a composition to a skin of a mobile platform
US20160311551A1 (en) Engine proximate nitrogen generation system for an aircraft
CA2870497A1 (en) Aircraft fuel supply systems
US10183238B2 (en) Flow splitting in supercritical fluid chromatography systems
CA2786065C (en) Combination membrane system for producing nitrogen enriched air
US20140130894A1 (en) Nitrogen enriched air supply system and aircraft
KR20140118167A (en) Gas boosting and lifting system for high productivity of undersea plant
EP3441126A1 (en) Inert gas generating system
CN109641644A (en) It is used to support the device of the propeller shaft of marine ship and repairs the method for the device
US20100258046A1 (en) Method and apparatus for suppressing cavitation on the surface of a streamlined body
JP2018076056A (en) Method for controlling the purity/flow rate relationship of an inert gas injected into a fuel tank, and an inerting system for carrying out the method
CN107792324B (en) Diving aerocar
US20160009408A1 (en) Nitrogen enriched air supply system and aircraft
US3301209A (en) Submersible vessels
EP3612443B1 (en) Prevention of cavitation
RU2339832C2 (en) Fuel feed system
WO2022229054A1 (en) System and method for reducing drag on a marine vessel
KR200472995Y1 (en) Azimuth type thruster
US10240410B1 (en) Hydraulic filtration and pressure testing device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18839770

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18839770

Country of ref document: EP

Kind code of ref document: A1