CN110318932A - A kind of multi-wall interference for underwater power generation - Google Patents

Abstract

The invention relates to a wing body assembly for underwater power generation, comprising a fuselage, an airfoil and a rudder surface; the rudder surface is located at the tail of the fuselage; the wingspan length is L, the aspect ratio is 6-10, Ratio ranges from 0.5 to 0.6, leading edge sweep angle λ ₁ ranges from 5° to 6°, and trailing edge sweep angle λ ₂ ranges from 4° to 5°; the generator is installed inside the fuselage to meet the center of mass of the rear wing-body assembly on the central axis. The wing-body assembly of the present invention adopts the design of increasing lift and reducing drag. The winglets on the tip of the wing block the air flow upward from the side of the wing, which can increase the lift. , the connection ball adopts the ellipsoid to achieve the effect of drag reduction as well. The maximum lift-to-drag ratio of the wing-body combination can reach 11, realizing the design of a high-lift-drag ratio wing-body combination. The wing body is applied to underwater power generation. Compared with the traditional vane, the structure is small and compact, which increases the water flow speed through the turbine and greatly improves the power generation efficiency.

Description

A wing-body assembly for underwater power generation

technical field

The invention relates to a wing-body assembly for underwater power generation, which belongs to the shape design of hydrodynamics and is applied to the field of clean energy ocean current power generation.

Background technique

The basic principle of the ocean current power generation device is to convert the kinetic energy of the ocean current flow into electrical energy through the power generation device. There are two main types of ocean current power generation devices that have been studied: parachute type and vane type. The vast majority of these ocean current power generation devices are fixed on the seabed, and the power generation devices are driven entirely by ocean currents with relatively low velocity. Taking the vane type power generation device as an example, the power generated is proportional to the cube of the ocean current and the square of the diameter of the vane. Therefore, in order to obtain sufficient power by utilizing the low-speed ocean current, the diameter of the blades is relatively large, and the scale of the unit is relatively large. The parachute-type power generation device is composed of dozens of "parachutes", which are connected in series on the ring-shaped hinge rope, relying on the force of the ocean current to expand and retract, reciprocating, and the hinge rope drives the hinge plate to rotate, thereby driving the generator to generate electricity.

Therefore, the large size and high start-up flow rate of the blade type power generation device are technical problems to be solved urgently in this field.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a wing-body assembly for underwater power generation, on which at least one generator can be installed, and can effectively generate electricity at a relatively low water flow rate, widely improving Application scope of power generation device.

The object of the invention is achieved through the following technical solutions:

Provide a wing-body assembly for underwater power generation, including fuselage, wing surface and rudder surface; the rudder surface is located at the tail of the fuselage; the wing surfaces are located on both sides of the fuselage, the wingspan length is L, and the aspect ratio is 6 to 10, the root-to-tip ratio ranges from 0.5 to 0.6, the leading edge sweep angle λ ₁ ranges from 5° to 6°, and the trailing edge sweep angle λ ₂ ranges from 4° to 5°; the generator is installed inside the fuselage to meet the installation requirements. The center of mass of the rear wing-body assembly is located on the central axis.

Preferably, the span length L ranges from 1550 mm to 1650 mm.

Preferably, the tip of the airfoil is provided with a winglet, the winglet is 0.5 to 0.8 of the length of the tip of the wing surface, the winglet is aligned with the rear end of the wing, and the front end is left vacant.

Preferably, the winglet is perpendicular to the plane where the chord length is located, the shape is trapezoidal, the lower base is installed on the wing tip, the length of the upper base ranges from 55mm to 65mm, the length of the lower base ranges from 95mm to 105mm, and the height ranges from 55mm to 65mm.

Preferably, the rudder surface is installed at the center of the rear edge of the fuselage, the height of the rudder surface ranges from 200mm to 220mm, and the width ranges from 90mm to 110mm.

Preferably, the head of the fuselage is a spherical cone with a length of 70 mm to 80 mm, the middle part is a cylindrical section with a length of 140 mm to 160 mm, the diameter of the cross-section circle is the height of the generator, and the bottom surface of the fuselage is a rectangle with chamfers, and the size of the rectangle is larger than that of the steering gear The minimum installation size is a smooth transition section with a length of 170mm to 190mm from the bottom of the cylindrical section to the bottom of the fuselage.

Preferably, there are three connecting rods, the lower ends of which are respectively connected to the connecting balls, and the height of the rods is adjustable within 500 mm to 1000 mm. It is symmetrical along the symmetry plane of the flying wing structure, and the included angle _θ1 with the symmetry plane ranges from 12° to 27°, the third connecting rod is located in the symmetry plane, the upper end is connected with the bottom of the fuselage, and the included angle θ2 with the vertical plane ranges from ₁₆ °～26°.

Preferably, the cross-sectional shape of the connecting rod is airfoil-like, the large end is half an ellipse, and the small end is shrunk along the tangential direction of the ellipse, and the width of the widest section of the first connecting rod and the second connecting rod is 4-6mm. The width of the widest part of the third connecting rod is 7-9mm; the big end of the connecting rod faces the direction of the leading edge of the wing.

Preferably, the connecting sphere is an ellipsoid.

Preferably, the flying wing is a shell structure with supporting ribs inside, and the generator is set inside the shell structure.

Preferably, the fuselage and the airfoil are hollow structures, and there is an accommodation cavity corresponding to the size of the generator inside the fuselage.

Preferably, for generators of different sizes, a fuselage whose accommodation cavity matches the size of the generator is selected, and the size of the airfoil remains unchanged.

Compared with the prior art, the present invention has the following advantages:

(1) The wing-body assembly of the present invention adopts the design of increasing lift and reducing drag, and the winglet hinders the airflow from flowing upwards from the side of the wing, which can improve the lift. Significantly reduce the resistance, and the connecting ball adopts an ellipsoid to achieve the effect of reducing resistance.

(2) The wing-body assembly of the present invention has a maximum lift-to-drag ratio of up to 11, realizing the design of a wing-body assembly with a high lift-to-drag ratio.

(3) The present invention optimizes the shape design of the wing body, so that the generator can be arranged inside the wing body, which improves the lift-to-drag ratio on the one hand, and on the other hand, realizes Integrated design of generator and wing body.

(4) The present invention matches the installation size of the fuselage and the generator, and the fuselage and the airfoil are processed separately. For generators of different sizes, only different fuselage structures need to be replaced, and the airfoil is a general structure.

(5) The present invention applies the wing-body assembly to underwater power generation. Compared with traditional vanes, it has a compact structure, improves the water flow velocity passing through the turbine, and greatly improves power generation efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the layout of the present invention;

Figure 2 is a top plan view of the airfoil;

Fig. 3 is a relative positional relationship diagram of the connecting rod; wherein (a) is a front view, and (b) is a side view;

Fig. 4 is a schematic diagram of the cross-sectional shape of the connecting rod;

Figure 5 is a schematic diagram of the installation position of the generator;

Figure 6 is a side view of the wing fuselage.

Detailed ways

The invention provides a wing-body assembly for underwater power generation, comprising a fuselage 1, an airfoil 2, a rudder surface 3, a winglet 4, a connecting ball 5, and a connecting rod 6; each part is fixedly connected Into an overall layout, the present invention has a simple structure and a high lift-to-drag ratio. After being connected by a flexible rope, it is placed in the water flow and can be controlled to move at several times the speed of the water flow through the rudder surface. Multiple generators are installed on the layout, which can effectively improve Generating power.

As shown in Fig. 1, the present invention provides a wing-body assembly for underwater power generation. The head of the fuselage 1 is a spherical cone, 70mm-80mm long, the middle part is a cylindrical section, 140mm-160mm long, the radius of the section circle is 25mm, and the bottom surface is a rectangle with chamfers. The size of the rectangle is larger than the minimum installation size of the steering gear. The length from the bottom of the section to the bottom is 170mm-190mm, with a smooth transition in the middle; the section of the airfoil 2 is a high lift-drag ratio airfoil, the root chord length ranges from 200mm to 210mm, the aspect ratio ranges from 6 to 10, and the tip-to-root ratio ranges from 0.5 to 0.6 , the leading edge sweep angle λ ₁ ranges from 5° to 6°, and the trailing edge sweep angle λ ₂ ranges from 4° to 5°, as shown in Figure 2; The rear edge of the rudder is in the middle, the height range of the rudder surface is 200mm-220mm, and the width range is 90mm-110mm; the winglet 4 is installed on both sides of the airfoil 2, one piece on the left and right, the cross section is airfoil, and the longitudinal section shape is trapezoidal. The length range of the trapezoidal upper bottom is 55mm-65mm, the length range of the lower bottom is 95mm-105mm, and the height range is 55mm-65mm. The winglet 3 is aligned with the rear end of the wing, and the front end is left vacant to further improve the lift.

As shown in Figure 6, the distance d between the airfoil 2 and the nose is 90-100 mm, and the leading edge point of the airfoil is on the central axis of the cylinder.

There are three connecting rods 6, the upper ends are respectively connected to the fuselage 1 and the bottom of the airfoil 2, and the lower ends are respectively connected to the connecting ball 5. The height of the rods ranges from 500 mm to 1000 mm. The relative positions of the three rods are shown in Figure 3. From the front view, Rod a and rod b are left-right symmetrical, and the included angle _θ1 with the symmetry plane ranges from 17° to 27°. Rod c is located in the symmetrical plane. From the side view, rod a and rod b are located in the vertical plane, and _The angle θ2 between the straight planes ranges from 16° to 26°, and the cross-sectional shape of the connecting rod 6 is similar to an airfoil. As shown in Figure 4, the large end is in the shape of a half ellipse, and shrinks along the tangent direction of the ellipse to form a small end, making the cross section streamlined. 8mm. The inside of the connecting rod c is used to lay out the signal lines of the steering gear, and plays a main supporting role, so the width is wider. The overall layout described can be scaled proportionally.

Referring to FIG. 5 , a space for placing the generator is provided inside the fuselage 1, so that the center of mass of the wing-body assembly after installation is located on the central axis and inside the wing root. The fuselage 1 is a shell structure, and the generator is arranged inside the shell structure.

To sum up, the present invention can adapt to the low-speed water flow environment and move according to a predetermined trajectory. Moreover, the layout structure is simple and the lift-to-drag ratio is high, and multiple generators can be installed on the layout to perform ocean current power generation.

Under the same generating power, the wingspan length of the invention is equivalent to that of the turbine blade, but the generating turbine is only 1/10 of the diameter of the traditional turbine.

The above description is only the best specific implementation mode of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of changes or modifications within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention.

The content that is not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.

Claims (12)

1. A wing-body assembly for underwater power generation is characterized in that, comprises fuselage (1), airfoil (2) and rudder surface (3); rudder surface (3) is positioned at the afterbody of fuselage; Wing The surface (2) is located on both sides of the fuselage ( ₁ ), the span length is L, the aspect ratio is 6-10, the tip-to-root ratio ranges from 0.5 to 0.6, the leading edge sweep angle λ1 ranges from 5° to 6°, and the rear Edge sweep angle λ ₂ ranges from 4° to 5°; the generator is installed inside the fuselage (1), so that the center of mass of the wing-body assembly is located on the central axis after installation. 2. The wing body assembly for underwater power generation according to claim 1, characterized in that the span length L ranges from 1550 mm to 1650 mm. 3. The wing-body assembly for underwater power generation as claimed in claim 1, characterized in that, the tip of the airfoil (2) is provided with a winglet (4), and the winglet (4) is a wing 0.5～0.8 of the length of the wing (2) slightly, the winglet (3) is aligned with the rear end of the wing, and the front end is left vacant. 4. The wing-body assembly for underwater power generation as claimed in claim 2, characterized in that the winglet (3) is perpendicular to the plane where the chord length is located, is trapezoidal in shape, and the bottom is installed on the wing tip, The length of the upper bottom ranges from 55mm to 65mm, the length of the lower bottom ranges from 95mm to 105mm, and the height ranges from 55mm to 65mm. 5. The wing-body assembly for underwater power generation as claimed in claim 1, characterized in that the rudder surface (3) is installed in the middle of the rear edge of the fuselage (1), and the height of the rudder surface ranges from 200mm to 220mm. The width ranges from 90mm to 110mm. 6. The wing-body assembly for underwater power generation according to claim 1, characterized in that the head of the fuselage (1) is a spherical cone with a length of 70 mm to 80 mm, and the middle part is a cylindrical section with a length of 140 mm to 160 mm. The height of the generator is the diameter of the section circle. The bottom surface of the fuselage (1) is a rectangle with chamfers. The size of the rectangle is larger than the minimum installation size of the steering gear. Transition. 7. The wing-body assembly for underwater power generation as claimed in claim 1, characterized in that there are three connecting rods (6), the lower ends of which are connected to the connecting balls (5) respectively, and the height of the rods can be adjusted within 500mm to 1000mm. Adjustment, the first connecting rod and the second connecting rod are located in the vertical plane, the upper ends are respectively connected to the bottom end of the airfoil (2), and are symmetrical along the symmetrical plane of the flying wing structure, and the included angle _θ1 with the symmetrical plane ranges from 12° to 27°, the third connecting rod is located in the symmetrical plane, the upper end is connected with the bottom end of the fuselage ( ₁ ), and the included angle θ2 with the vertical plane ranges from 16° to 26°. 8. The wing-body assembly for underwater power generation as claimed in claim 7, characterized in that, the cross-sectional shape of the connecting rod is similar to that of an airfoil, the large end is half an ellipse, and the small end is formed by shrinking along the ellipse tangent direction , the width of the widest part of the section of the first connecting rod and the second connecting rod is 4-6mm, and the width of the widest part of the third connecting rod is 7-9mm; the big end of the connecting rod faces the leading edge of the airfoil. 9. The wing-body assembly for underwater power generation according to claim 7, characterized in that the connection ball (4) is an ellipsoid. 10. The wing-body assembly for underwater power generation according to claim 1, wherein the flying wing is a shell structure with supporting ribs inside, and the generator is set inside the shell structure. 11. The wing body assembly for underwater power generation as claimed in claim 1, characterized in that, the fuselage (1) and the airfoil (2) are hollow structures, and the inside of the fuselage (1) has size chamber. 12. The wing-body assembly for underwater power generation as claimed in claim 1, characterized in that, for generators of different sizes, the fuselage (1) and the airfoil (2) with the accommodation chamber and the size of the generator matched are selected. ) remains unchanged in size.