CN106338083B - A kind of minute yardstick knock system of variable boundary condition - Google Patents
A kind of minute yardstick knock system of variable boundary condition Download PDFInfo
- Publication number
- CN106338083B CN106338083B CN201610802307.2A CN201610802307A CN106338083B CN 106338083 B CN106338083 B CN 106338083B CN 201610802307 A CN201610802307 A CN 201610802307A CN 106338083 B CN106338083 B CN 106338083B
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- ddt
- component
- sections
- slidably
- slide track
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- 238000005474 detonation Methods 0.000 claims abstract 14
- 230000004888 barrier function Effects 0.000 claims 8
- 229910000831 Steel Inorganic materials 0.000 claims 3
- 238000009434 installation Methods 0.000 claims 3
- 239000010959 steel Substances 0.000 claims 3
- 241000397426 Centroberyx lineatus Species 0.000 claims 1
- 238000003754 machining Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
- 239000012780 transparent material Substances 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 238000007751 thermal spraying Methods 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/002—Wall structures
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
本发明提出一种可变边界条件的微尺度爆震系统，包括滑轨组件、可滑动DDT段、障碍物销钉和光滑壁面组件。该装置使用可滑动的DDT段与可更换的障碍物销钉，可以对爆震管中DDT段的位置与障碍物的形状进行改变，从而实现在使用过程中根据情况随时调整装置的爆震边界。该类型装置在国内外尚属首创，具有结构简单、使用方便、可以较好地适应变化的使用环境、提高燃烧效率并节约时间与成本等优势。可在爆震推进、热喷涂及爆震研究领域得到应用。
The invention proposes a micro-scale detonation system with variable boundary conditions, which includes a slide rail assembly, a slidable DDT segment, an obstacle pin and a smooth wall surface assembly. The device uses a slidable DDT segment and a replaceable obstacle pin, which can change the position of the DDT segment in the detonation tube and the shape of the obstacle, so as to adjust the detonation boundary of the device at any time according to the situation during use. This type of device is the first at home and abroad, and has the advantages of simple structure, convenient use, better adaptability to changing use environments, improved combustion efficiency, and time and cost savings. It can be applied in the fields of detonation propulsion, thermal spraying and detonation research.
Description
Technical field
The present invention relates to detonating combustions and minute yardstick pinking application field, specially the minute yardstick pinking of variable boundary condition
System.
Background technique
Burning all by human research and is utilizing always as a kind of oxidation reaction to release energy, and as current
The main source of the social energy and power.Burning includes many forms, if by characteristic and mode that chemical reaction is propagated, it can be with
It is divided into the forms such as strong thermal decomposition, deflagration and pinking.Currently, most common combustion system is deflagration burning in practical applications,
This combustion system has substantially obtained sufficient excavation by prolonged research, potentiality, is imitated using the heat engine of deflagration
Rate is difficult to further increase.Therefore, using the power device of detonating combustion because its combustion process in the very high thermal efficiency and compared with
Low entropy increases, and becomes the hot spot of current research.Since detonating combustion process is excessively violent, the imagination being applied to is focused primarily upon
In terms of aerospace jet-propulsion plant and thermal spraying.
The theoretical efficiency of cycle of detonating combustion is substantially better than deflagration.But due to detonation wave inherent instability,
Flammability limits will be narrower than deflagration burning, and the condition of proper detonation is also more harsh.Therefore, for pinking reaction unit, guarantee quick-fried
The starting of seismic wave and normal propagation important in inhibiting.
The Flammability limits of pinking is mainly under pressure, caliber, temperature and detonation tube inner wall coarse degree influence.Different items
Under part, limit of detonability is different.Especially for minute yardstick pinking, since its combustion process is affected by wall surface heat transfer, therefore
Its limit of detonability is affected by factors such as pinking pipe size, wall roughness and blockage ratios.By being finely adjusted to detonation tube,
The work boundary of detonation device can relatively significantly be changed.
Meanwhile it is how stable, effectively generate one of difficult point that detonation wave is also detonation device research and application.Detonation wave
Rise begin by direct initiation, deflagration to pinking change (Deflagration-to-Detonation Transition, letter
Claim DDT) and shock wave focus detonation (Shock-to-Detonation Transition, abbreviation SDT) etc. several ways realization.Its
The ignition control device of middle demand of the direct initiation to huge ignition energy and shock wave focus detonation overcomplicated make it is current this
The two is seldom applied；And can use lesser ignition energy and it is simple DDT sections effectively generate detonation wave DDT mistake
Cheng Ze becomes the pinking starting means of current main-stream.However, the DDT sections of heat releases that can reduce detonation device to a certain extent are imitated
Rate.Therefore, how to reduce by DDT sections of bring energy losses as far as possible, be the main problem faced in the design of detonating combustion device
One of.
In the fields such as spacecraft propulsion field and thermal spraying, minute yardstick pinking has relatively broad application prospect.But
Under extreme conditions, the unstability of pinking may cause failure of apparatus.And not yet occur can change micro- ruler both at home and abroad at present
Spend the detonation device of pinking boundary condition.Therefore, design is a set of can neatly change in pinking pipe size and detonation tube DDT sections
Obstacle species and position, to change the detonation device of its work boundary condition, for showing in fact in a variety of contexts, especially
It is normal, efficient operation important in inhibiting in extreme circumstances.
Summary of the invention
Technical problems to be solved
For the deflagration burning being widely used at present, although detonating combustion has the higher efficiency of cycle, but
The boundary condition of its proper detonation but relative narrower.In pressure, temperature is lower or equivalent proportion is beyond in the case where Flammability limits,
Its normal work can be guaranteed by needing to change detonation tube wall roughness or pinking pipe diameter.But the increase meeting of wall roughness
Reduce detonation wave spread speed, under some conditions can generation efficiency loss.Due to the influence of the factors such as heat transfer, this office
It limits more obvious in minute yardstick detonating combustion device.To solve the problems, such as that highly exothermic efficiency and wide detonable range are incompatible, this
Invention is proposed uses the slide track component with adjustable installing position, slidably DDT sections and barrier pin in rectangular detonation tube
The detonation device of nail is adjusted flexibly detonation device wall roughness, detonation tube blockage ratio and pinking pipe size to realize,
It can be applied to pinking propulsion, hot spray apparatus and pinking experimental field.
The technical solution of the present invention is as follows:
A kind of minute yardstick knock system of variable boundary condition, including slide track component, slidably DDT sections, barrier pin
With hydraulically smooth surface component, it is characterised in that: hydraulically smooth surface component is directly installed on slide track component by bolt, provides detonation tube
Front and back wall surface；It is slidably mounted on slide track component by dovetail groove for DDT sections, the upper lower wall surface in the middle part of rectangular detonation tube
It is interior, it can slide axially along detonation tube and be skidded off from minute yardstick knock system right end；Barrier pin is fixed in slidably DDT section
Pin hole on.
By changing the installation site of slide track component, the type of slidably DDT sections of position and barrier pin, using
When, it can quickly change detonation tube blockage ratio and wall roughness, and adjustment DDT fragment position and detonation tube ruler in a certain range
Very little, to expand the condition range that knock system can work normally, the working efficiency being allowed in normal conditions is improved,
And it can also be worked normally near the lean and fat oil limit and under low pressure, low temperature these extreme operating conditions.
The slide track component is made of rectangle steel plate, is divided into the top part and the bottom part point；Rectangle steel plate is equipped with can for installation
The sliding rail of DDT sections of sliding, sliding rail section are swallow-tail form, are matched with slidably DDT sections；The two sides up and down of slide track component have respectively
One row is used to install the bolt hole of hydraulically smooth surface component, by changing installation site, between upper and lower two parts slide track component away from
From can change, so that pinking channel width be made to change.
Described slidably DDT sections is divide into upper part and lower part, and is installed on the upper and lower slide rail of slide track component by dovetail groove respectively
On, two parts shape is identical, and thickness is consistent with slide track component, two-part spacing can with the change of upper and lower slide rail module position and
Change；It is slidably detonation tube conduit between DDT sections two parts up and down, other two wall surface of rectangular detonation tube is by smooth wall
Face component provides；Thereon close to the pin hole of conduit being provided on one side for installing barrier pin, and scale is carved in its side,
Its position with respect to slide track component can be measured in an experiment；Up and down slidably DDT sections it is mutually indepedent, and can on the slide rail from
By sliding.
Barrier pin upper end is circle, for barrier pin to be fixed on slidably DDT sections；Middle part is three
Angular, triangular base plane is concordant with pinking tube wall, and barrier used in experiment is processed in bottom plane；Pass through
Replace the barrier pin of variety classes, size and quantity, thus it is possible to vary the roughness of detonation tube inner wall and the resistance of detonation tube
Ratio is filled in, to adapt to different operating conditions.
The hydraulically smooth surface component is made of rectangle steel plate, and inner wall surface thereof requires have higher smoothness, works as minute yardstick
When knock system is used for experiment package, transparent material can be used；Hydraulically smooth surface component is fixed by bolts in the two of slide track component
Side, two rows of bolts hole thereon are conduit shape, and bolt can slide wherein when being in non-tight condition, and it is in tight condition
Position immobilizes, to guarantee that the installation site of slide track component is adjustable；Hydraulically smooth surface component is for providing the front and back of detonation tube
Hydraulically smooth surface, and can provide form needed for optical measurement means in experiment.
The machined surface to contact with each other between described slidably DDT sections, barrier pin and hydraulically smooth surface component must have
Higher machining accuracy, and in portion using being interference fitted, to guarantee that pinking conduit has good air-tightness.
Beneficial effect
Using the minute yardstick knock system of variable boundary condition provided by the invention, by neatly change slide track component and
Slidably DDT fragment position and barrier pin type can change the work of detonation device according to application demand and working environment
Make boundary condition or obtains peak efficiency.This system need to only change slide track component installation site, slidably DDT fragment position and obstacle
Object pin, so that it may a variety of detonation tube patterns are realized by being arranged combination, it can be more preferable relative to traditional knock system
Ground adapts to changeable working environment.Because no replacement is required, entire detonation tube is suitable for different operating conditions, is being especially aerospace
The low pressure that often occurs in propulsion device, worst cold case, can also be by adjusting working limit under the conditions of gas source supply is insufficient
To guarantee to work normally, therefore there is significant advantage in cost.Meanwhile if as experimental system, in a series of phases
In the experiment of pass, directly relative dimensions can be adjusted according to staged experiment result, without re-working, to save
It saves time, improves conventional efficient.
Detailed description of the invention
Fig. 1: system schematic of the invention
Fig. 2: slide track component schematic diagram
Fig. 3: slidably DDT sections of schematic diagrames
Fig. 4: hydraulically smooth surface component diagram
Fig. 5: several barrier pin schematic diagrames
Wherein, 1-1 is slidably DDT sections, and 1-2 is barrier pin, and 1-3 is slide track component, and 1-4 is barrier pin
Hole, 1-5 are bolt hole, and 1-6 is pinking conduit, and 1-7 is hydraulically smooth surface component, and 1-8 is bolt, and 1-9 is scale.
Specific embodiment
Below with reference to specific example and attached drawing, the invention will be further described
A kind of minute yardstick knock system of variable boundary condition, each section component are carried out according to structure shown in attached drawing 1
Assembling, direction as shown in Fig. 1, left side are detonation device head, and right side is detonation device tail portion, and igniter should be installed on head
Portion.
After being installed, size of the barrier pin 1-2 without changing pinking conduit 1-6 is such as needed replacing, it is only necessary to will be right
It should slidably be taken out from device tail portion along sliding rail DDT sections of 1-1, remove old barrier pin 1-2, new barrier pin 1-2 is installed,
And it will slidably DDT sections of 1-1 be reinstalled on sliding rail from device tail portion.Due to barrier pin 1-2 and barrier pin
Using interference fit between nail hole 1-4, the process of removing and installing may may require that gently to be tapped using tool.It such as needs to change quick-fried
The size for shaking conduit 1-6 needs the bolt 1-8 of dismantling connection slide track component 1-3 and hydraulically smooth surface component 1-7, changes slide track component
After the position of 1-3 makes pinking conduit 1-6 width reach preset value, bolt 1-8 is reinstalled.
When device needs work under low temperature, low pressure or oil-poor environment, larger, more barrier pin 1- should be installed
The width of 2 or appropriate reduction pinking conduit 1-6, to increase the blockage ratio of wall roughness Yu pinking conduit 1-6, to guarantee to fill
Setting can work normally.
When device is in more benign environment, under room temperature, condition of normal pressure, when work, lesser barrier pin should be installed
Nail 1-2 simultaneously reduces barrier pin 1-2 quantity, to reduce the blockage ratio of pinking conduit 1-6, improves detonation device work effect
Rate.If working environment is optimum condition and flammable mixed gas is stoichiometric ratio, the pin of clear can be used to guarantee
Highest working efficiency.
In the case where operating condition is constant, if supply pressure reduces or working frequency improves, slide track component should be adjusted
1-3 is to reduce pinking conduit 1-6 width, to guarantee to be filled up completely；If supply pressure improves or working frequency reduces, can adjust
Slide track component 1-3 is to increase the width of pinking conduit 1-6, to avoid the waste of fuel and oxidant.
Claims (7)
1. a kind of minute yardstick knock system of variable boundary condition, including slide track component, slidably DDT sections, barrier pin and
Hydraulically smooth surface component, it is characterised in that: hydraulically smooth surface component is directly installed on slide track component by bolt, before providing detonation tube
Rear surface；Slidably it is mounted on slide track component by dovetail groove for DDT sections, in the upper lower wall surface in the middle part of rectangular detonation tube,
It can slide axially along detonation tube and be skidded off from minute yardstick knock system right end；Barrier pin is fixed in slidably DDT section
On pin hole.
2. a kind of minute yardstick knock system of variable boundary condition according to claim 1, it is characterised in that: pass through change
The type of the installation site of slide track component, slidably DDT sections of position and barrier pin can quickly change when in use
Detonation tube blockage ratio and wall roughness, and adjustment DDT fragment position and pinking pipe size in a certain range, to expand pinking
The condition range that system can work normally, the working efficiency being allowed in normal conditions are improved, and in the lean and fat oil limit
Nearby and under low pressure, low temperature these extreme operating conditions can also it work normally.
3. a kind of minute yardstick knock system of variable boundary condition according to claim 1, it is characterised in that: the sliding rail
Component is made of rectangle steel plate, is divided into the top part and the bottom part point；Rectangle steel plate is equipped with the sliding rail for installing slidably DDT sections,
Sliding rail section is swallow-tail form, is matched with slidably DDT sections；The two sides up and down of slide track component have a row smooth for installing respectively
The bolt hole of wall surface component, by changing installation site, the distance between upper and lower two parts slide track component be can change, to make
Pinking channel width changes.
4. a kind of minute yardstick knock system of variable boundary condition according to claim 1, it is characterised in that: described to slide
Dynamic DDT sections are divide into upper part and lower part, and are installed on the upper and lower slide rail of slide track component by dovetail groove respectively, two parts shape phase
Together, thickness is consistent with slide track component, and two-part spacing can change with the change of upper and lower slide rail module position；Slidably DDT
It is detonation tube conduit between two parts up and down of section, other two wall surface of rectangular detonation tube is provided by hydraulically smooth surface component；Its
The upper pin hole being provided on one side for installing barrier pin close to conduit, and scale is carved in its side, it can be in an experiment
Measure its position with respect to slide track component；Up and down slidably DDT sections it is mutually indepedent, and can be free to slide on the slide rail.
5. a kind of minute yardstick knock system of variable boundary condition according to claim 1, it is characterised in that: the obstacle
Object pin upper end is circle, for barrier pin to be fixed on slidably DDT sections；Middle part is triangle, triangular base
Plane is concordant with pinking tube wall, and barrier used in experiment is processed in bottom plane；By replacing variety classes, ruler
Very little and quantity barrier pin, thus it is possible to vary the roughness of detonation tube inner wall and the blockage ratio of detonation tube, to adapt to not
Same operating condition.
6. a kind of minute yardstick knock system of variable boundary condition according to claim 1, it is characterised in that: described smooth
Wall surface component is made of rectangle steel plate, and inner wall surface thereof requires have higher smoothness, when minute yardstick knock system is for testing
When component, transparent material can be used；Hydraulically smooth surface component is fixed by bolts in the two sides of slide track component, two rows of bolts thereon
Hole is conduit shape, and bolt can slide wherein when being in non-tight condition, and it immobilizes position in tight condition, thus
Guarantee that the installation site of slide track component is adjustable；Hydraulically smooth surface component can provide for providing the front and back hydraulically smooth surface of detonation tube
Form needed for optical measurement means in experiment.
7. a kind of minute yardstick knock system of variable boundary condition according to claim 1, it is characterised in that: described to slide
The necessary machining accuracy with higher of the machined surface to contact with each other between DDT sections dynamic, barrier pin and hydraulically smooth surface component, and
In portion using being interference fitted, to guarantee that pinking conduit has good air-tightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802307.2A CN106338083B (en) | 2016-09-06 | 2016-09-06 | A kind of minute yardstick knock system of variable boundary condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802307.2A CN106338083B (en) | 2016-09-06 | 2016-09-06 | A kind of minute yardstick knock system of variable boundary condition |
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| Publication Number | Publication Date |
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| CN106338083A CN106338083A (en) | 2017-01-18 |
| CN106338083B true CN106338083B (en) | 2019-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610802307.2A Expired - Fee Related CN106338083B (en) | 2016-09-06 | 2016-09-06 | A kind of minute yardstick knock system of variable boundary condition |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827704B (en) * | 2019-02-28 | 2020-08-25 | 西北工业大学 | Microscale detonation thrust measurement device based on pendulum method |
| CN109946086B (en) * | 2019-04-09 | 2020-08-25 | 西北工业大学 | A Design Method of Detonation Chamber with Obstacles for PLIF Measurement Technology |
| CN110173374B (en) * | 2019-05-14 | 2021-03-26 | 西北工业大学 | Variable-blockage-ratio detonation tube based on iris diaphragm principle |
| CN110761898B (en) * | 2019-09-25 | 2020-09-29 | 中国科学院广州能源研究所 | A device for ultra-enthalpy detonation using microscale helical channels |
| US20210108801A1 (en) * | 2019-10-14 | 2021-04-15 | General Electric Company | System for Rotating Detonation Combustion |
| CN112780418B (en) * | 2020-12-07 | 2022-04-12 | 西安航天动力研究所 | Shock wave focus exploder with microscale detonation wave attenuation |
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|---|---|---|---|---|
| EP1621815A1 (en) * | 2004-07-20 | 2006-02-01 | C.R.F. Società Consortile per Azioni | Microcombustor |
| CN101144442A (en) * | 2007-10-18 | 2008-03-19 | 西北工业大学 | A multi-tube pulse detonation combustion chamber and its detonation method |
| CN102619643A (en) * | 2012-03-31 | 2012-08-01 | 西北工业大学 | Jet ignition device of pulse detonation engine |
| CN104832948A (en) * | 2015-04-23 | 2015-08-12 | 中国人民解放军空军工程大学 | Fingerprint mesh cooling device for concave cavity combustion chamber |
-
2016
- 2016-09-06 CN CN201610802307.2A patent/CN106338083B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1621815A1 (en) * | 2004-07-20 | 2006-02-01 | C.R.F. Società Consortile per Azioni | Microcombustor |
| CN101144442A (en) * | 2007-10-18 | 2008-03-19 | 西北工业大学 | A multi-tube pulse detonation combustion chamber and its detonation method |
| CN102619643A (en) * | 2012-03-31 | 2012-08-01 | 西北工业大学 | Jet ignition device of pulse detonation engine |
| CN104832948A (en) * | 2015-04-23 | 2015-08-12 | 中国人民解放军空军工程大学 | Fingerprint mesh cooling device for concave cavity combustion chamber |
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| CN106338083A (en) | 2017-01-18 |
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