CN107421712B - A kind of device and method weakening hydrogen detonation shock tube rarefaction wave - Google Patents
A kind of device and method weakening hydrogen detonation shock tube rarefaction wave Download PDFInfo
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- CN107421712B CN107421712B CN201710699982.1A CN201710699982A CN107421712B CN 107421712 B CN107421712 B CN 107421712B CN 201710699982 A CN201710699982 A CN 201710699982A CN 107421712 B CN107421712 B CN 107421712B
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- baffle
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- wave
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
Abstract
The invention discloses a kind of devices for weakening hydrogen detonation shock tube rarefaction wave comprising detonation driven section, changeover portion, by drive section, diaphragm and baffle；Detonation driven section, changeover portion are sequentially connected by drive section；In the junction of detonation driven section, changeover portion, diaphragm is set；Baffle is set in changeover portion, by the junction of drive section, the upper end of baffle is hinged with changeover portion or by the pipeline of drive section；When detonation driven section formed incident shock after breaking through diaphragm, start baffle, incident shock passes through, and propagates to by drive section；Portions incident shock wave reflects at baffle simultaneously, mutually interferes with rarefaction wave, weakens rarefaction wave to the attenuation of incident shock, to extend the Steady Flow time of incident shock；After incident shock passes through baffle, baffle re-closes under the effect of gravity.The present invention also provides a kind of methods for weakening hydrogen detonation shock tube rarefaction wave.The present invention can effectively weaken hydrogen detonation shock tube rarefaction wave, increase the steady gas flow for experimental study there are the times.
Description
Technical field
The present invention relates to a kind of device and methods for weakening hydrogen detonation shock tube rarefaction wave, are mainly used for simulated explosion ring
The propagation law research of shock wave and blast injury experimental study under border.
Background technique
For the chemical energy that hydrogen detonation shock tube is discharged using instantaneous detonation as power, driving capability is much higher than High Pressure Hydrogen/helium
The shock tube of gas-powered.For the incident shock for generating same intensity, the driving pressure that the latter needs is about the former several times, because
And the equipment of oxygen hydrogen detonation driven is simpler, gas consumption is less, and experimental cost is lower, is detailed in Jiang Zonglin, Li Jinping, Zhao
The long test period detonation driven shock tunnel technical research of big, Liu Yunfeng, Yu Hongru, 2012,05:824-831.
For hydrogen detonation shock tube, under the same conditions, swash by drive section pressure to generate the incidence of same intensity
Wave, drive section initial pressure an order of magnitude lower than reversed detonation driven needed for forward direction detonation driven.But forward direction detonation produces
Raw shock wave can be caught up with by the Taylor rarefaction wave after detonation wave, weaken intensity, permanent action time is short, is detailed in the spy of Yu Hongru
Suo Fazhan shock tunnel detonation actuation techniques, 2011,06:978-983.
In order to weaken the influence of Taylor rarefaction wave, increase the steady gas flow that can be used for experimental study there are the time, can
By increasing detonation driven segment length, expanding detonation driven section cross-sectional area, it is detailed in the oxyhydrogen combustion and detonation driven of Yu Hongru
Shock tube, 1999 (04): the development process of the shock tube oxygen hydrogen detonation driven technology of 389-396 and Yu Hongru, Li Bin, Chen Hong,
2005 (03): 315-322.It can also be by being inserted into toroidal cavity, the Thailand being detailed in the decrease detonation wind-tunnel of Jiang Zonglin at diaphragm
Strangle the device of wave, Chinese patent: CN2663964,2004-12-15.Double detonation driven methods also can be used, be detailed in Duan Chenhong, Feng
The top gem of a girdle-pendant, Yu Hongru be used for shock tube/wind-tunnel double detonation driver, 2004,02:183-191.But increase detonation driven section
The drawbacks of length can increase equipment size accordingly, generate gas consumption and increase, and experimental cost improves；Expand detonation driven Duan Heng
Sectional area, i.e., using more smaller than drive section caliber by drive section, it is contemplated that shock wave is caused injury the needs of experiment, after drive section
Usually connect the experimental section of major diameter, shock strength can minor diameter by the expansion segment of drive section to major diameter experimental section substantially
Degree decaying, is unfavorable for testing, influences test result；The method that toroidal cavity and double detonation drivens are inserted at diaphragm, can make to set
Standby structure is complicated, and cost is high.Therefore, the device of our the decrease hydrogen detonation shock tube rarefaction waves there is an urgent need to one kind newly and side
Method.
Summary of the invention
The purpose of the present invention is to provide a kind of device and method for weakening hydrogen detonation shock tube rarefaction wave, the device knots
Structure is simple, easy to use, and this method can effectively weaken hydrogen detonation shock tube rarefaction wave, and increase can be used for the permanent of experimental study
Air-flow there are the times.
The technical scheme adopted by the invention is that:
It is a kind of weaken hydrogen detonation shock tube rarefaction wave device comprising detonation driven section, changeover portion, by drive section,
Diaphragm and baffle；The detonation driven section, changeover portion are sequentially connected by drive section；In detonation driven section, the junction of changeover portion
Diaphragm is set；In changeover portion, baffle, the upper end of baffle and changeover portion or the pipeline by drive section are set by the junction of drive section
It is hinged；When the incident shock that detonation driven section is formed is after breaking through diaphragm, baffle is started, incident shock passes through, to being driven
Section is propagated；Portions incident shock wave reflects at baffle simultaneously, mutually interferes with rarefaction wave, weakens rarefaction wave to incident shock
Attenuation, to extend the Steady Flow time of incident shock；After incident shock passes through baffle, baffle is under the effect of gravity
It re-closes.
According to the above scheme, detonation driven section, the inside and outside caliber of changeover portion are all the same, compare detonation driven by the internal diameter of drive section
Big 60~the 100mm of internal diameter of section；The baffle is installed on the pipeline of changeover portion.The structure conveniently installs baffle, improves device
Installing and dismounting speed, to improve test efficiency.
According to the above scheme, the upper end of baffle is hinged with changeover portion or by the pipeline of drive section by axis, and baffle can be around axis
Rotation, realization are raised and are closed.
According to the above scheme, by the thickness of controllable register, the intensity of the incident shock passed through is controlled.
The present invention also provides a kind of device using above-mentioned decrease hydrogen detonation shock tube rarefaction wave carry out weaken hydrogen-oxygen it is quick-fried
The method of Hong shock tube rarefaction wave comprising following steps:
Incident shock is formed by detonation driven section；After incident shock breaks through diaphragm, the gear of changeover portion tail end will be mounted on
Plate starts, and propagates to by drive section；Meanwhile portions incident shock wave reflects at baffle, mutually interferes with rarefaction wave, weakens dilute
Rarefaction wave is to the attenuation of incident shock, to extend the Steady Flow time of incident shock；
After incident shock passes through baffle, baffle re-closes under the effect of gravity.
The present invention is when beneficial effect:
Only by detonation driven section, changeover portion, by drive section, diaphragm, that baffle can effectively weaken hydrogen detonation shock tube is dilute
Rarefaction wave, increase can be used for experimental study steady gas flow there are the time, structure is very simple, and operation is very easy, experiment at
This is low, high-efficient；
Without increasing detonation driven segment length, equipment size will not be increased, will not be increased using tolerance；
The shock wave that the present invention is reflected using hinged baffle is concerned with the rarefaction wave generated in the reflection of drive section endface
It disturbs, weakens rarefaction wave to the attenuation of incident shock, to extend the Steady Flow time of incident shock, that is, when increasing experiment
Between.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is view of the device of decrease hydrogen detonation shock tube rarefaction wave in pipe lengths；
Fig. 2 is view of the device of decrease hydrogen detonation shock tube rarefaction wave on pipe diameter direction；
Wherein: 1, detonation driven section, 2, diaphragm, 3, changeover portion, 4, baffle, 5, by drive section.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Referring to Fig. 1 and Fig. 2, a kind of device weakening hydrogen detonation shock tube rarefaction wave comprising detonation driven section 1, mistake
Cross section 3, by drive section 5, diaphragm 2 and baffle 4, detonation driven section 1, the inside and outside caliber of changeover portion 3 are all the same, by drive section 5
Internal diameter is 60~100mm bigger than the internal diameter of detonation driven section 1, changeover portion 3 (i.e. the installation space of articulated structure is 30~50mm)；It is quick-fried
Hong drive section 1, changeover portion 3 is sequentially connected by drive section 5；In the junction of detonation driven section 1, changeover portion 3, diaphragm 2 is set；?
Baffle 4 is arranged by the flange connections of drive section 5 in changeover portion 3, and the upper end of baffle 4 and the pipeline of changeover portion are hinged；Work as detonation
The incident shock (detonation wave) that drive section 1 is formed starts baffle 4, incident shock (detonation wave) passes through baffle after breaking through diaphragm 2
4, it is propagated to by drive section 5；Portions incident shock wave (detonation wave) reflects at baffle 4 simultaneously, mutually interferes, subtracts with rarefaction wave
Weak rarefaction wave is to the attenuation of incident shock (detonation wave), to extend the Steady Flow time of incident shock (detonation wave)；
After incident shock (detonation wave) passes through baffle 4, baffle 4 re-closes under the effect of gravity.
In the present invention, the intensity of the incident shock passed through can be controlled by the thickness of controllable register 4.
In the present invention, setting sliding rail it can be supported under detonation driven section 1, for dismantling and replacing diaphragm.For convenience of peace
Dress, the length of changeover portion 3 are 2~3 times of its diameter.
The present invention also provides a kind of device using above-mentioned decrease hydrogen detonation shock tube rarefaction wave carry out weaken hydrogen-oxygen it is quick-fried
The method of Hong shock tube rarefaction wave comprising following steps:
Incident shock is formed by detonation driven section；After incident shock breaks through diaphragm, the gear of changeover portion tail end will be mounted on
Plate starts, and propagates to by drive section；Meanwhile portions incident shock wave reflects at baffle, mutually interferes with rarefaction wave, weakens dilute
Rarefaction wave is to the attenuation of incident shock, to extend the Steady Flow time of incident shock；
After incident shock passes through baffle, baffle re-closes under the effect of gravity, occurs in detonation driven section endface
The sparse intensity of wave that reflection generates is not enough to start baffle, simultaneously because the interference of reflected shock wave, reflection rarefaction wave swashs incidence
The attenuation of wave will weaken.
After applying the present invention, although Taylor rarefaction wave does not completely eliminate, its attenuation to incident shock
It is reduced to experiment acceptable degree, the permanent driving time of experimental wind flow when not installing baffle than being greatly improved.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (3)
1. a kind of device for weakening hydrogen detonation shock tube rarefaction wave, it is characterised in that: including detonation driven section, changeover portion, quilt
Drive section, diaphragm and baffle；The detonation driven section, changeover portion are sequentially connected by drive section；In detonation driven section, changeover portion
Junction be arranged diaphragm；In changeover portion, baffle is set by the junction of drive section, the upper end of baffle and changeover portion or is driven
The pipeline of section is hinged；When detonation driven section formed incident shock after breaking through diaphragm, start baffle, incident shock passes through,
It is propagated to by drive section；Portions incident shock wave reflects at baffle simultaneously, mutually interferes with rarefaction wave, and decrease rarefaction wave is to entering
The attenuation of shock wave is penetrated, to extend the Steady Flow time of incident shock；After incident shock passes through baffle, baffle is in weight
It is re-closed under power effect.
2. the device of the decrease hydrogen detonation shock tube rarefaction wave according to claim 1, it is characterised in that: detonation is driven
Dynamic section, the inside and outside caliber of changeover portion are all the same, 60~100mm bigger than the internal diameter of detonation driven section by the internal diameter of drive section.
3. a kind of device using any decrease hydrogen detonation shock tube rarefaction wave of claim 1-2 carries out decrease hydrogen
The method of oxygen detonation shock tube rarefaction wave, it is characterised in that include the following steps:
Incident shock is formed by detonation driven section；After incident shock breaks through diaphragm, the baffle for being mounted on changeover portion tail end is lifted
It rises, is propagated to by drive section；Meanwhile portions incident shock wave reflects at baffle, mutually interferes with rarefaction wave, weakens rarefaction wave
To the attenuation of incident shock, to extend the Steady Flow time of incident shock；
After incident shock passes through baffle, baffle re-closes under the effect of gravity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710699982.1A CN107421712B (en) | 2017-08-16 | 2017-08-16 | A kind of device and method weakening hydrogen detonation shock tube rarefaction wave |
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| CN201710699982.1A CN107421712B (en) | 2017-08-16 | 2017-08-16 | A kind of device and method weakening hydrogen detonation shock tube rarefaction wave |
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| CN107421712A CN107421712A (en) | 2017-12-01 |
| CN107421712B true CN107421712B (en) | 2019-05-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111693247B (en) * | 2020-06-22 | 2021-04-20 | 中国科学院力学研究所 | Bidirectional detonation driving method for detonation-driven shock tunnel |
| CN112113702B (en) * | 2020-09-23 | 2021-04-06 | 中国空气动力研究与发展中心高速空气动力研究所 | Pressure-sensitive paint response time calibration device based on non-electric detonator driving type shock tube |
| CN112245058B (en) * | 2020-10-10 | 2022-09-13 | 中国人民解放军陆军特色医学中心 | Animal impact injury simulation experiment device |
| CN115971487B (en) * | 2023-03-21 | 2023-06-09 | 东北大学 | Neodymium iron boron magnet explosion pressing forming die and forming method |
| CN117405351B (en) * | 2023-12-14 | 2024-03-12 | 中国空气动力研究与发展中心计算空气动力研究所 | Advance pipe wind tunnel structure for reducing incoming flow noise |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3618380A (en) * | 1968-11-05 | 1971-11-09 | Gen Electric | Continuous discharge driver freepiston shock tunnel |
| JPH0979938A (en) * | 1995-09-18 | 1997-03-28 | Chugoku Kayaku Kk | Method for generating high-speed flow in shock wind tunnel and method for breaking diaphragm of this wind tunnel |
| CN2663964Y (en) * | 2003-09-08 | 2004-12-15 | 中国科学院力学研究所 | Equipment for damping Taylor wave in detonation wind tunnel |
| CN102384834A (en) * | 2011-08-10 | 2012-03-21 | 中国科学院力学研究所 | Detonation-driving shock tunnel explosive discharge device |
| CN103149007A (en) * | 2013-01-29 | 2013-06-12 | 中国科学院力学研究所 | Detonation drive shock tunnel forming membrane |
-
2017
- 2017-08-16 CN CN201710699982.1A patent/CN107421712B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3618380A (en) * | 1968-11-05 | 1971-11-09 | Gen Electric | Continuous discharge driver freepiston shock tunnel |
| JPH0979938A (en) * | 1995-09-18 | 1997-03-28 | Chugoku Kayaku Kk | Method for generating high-speed flow in shock wind tunnel and method for breaking diaphragm of this wind tunnel |
| CN2663964Y (en) * | 2003-09-08 | 2004-12-15 | 中国科学院力学研究所 | Equipment for damping Taylor wave in detonation wind tunnel |
| CN102384834A (en) * | 2011-08-10 | 2012-03-21 | 中国科学院力学研究所 | Detonation-driving shock tunnel explosive discharge device |
| CN103149007A (en) * | 2013-01-29 | 2013-06-12 | 中国科学院力学研究所 | Detonation drive shock tunnel forming membrane |
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