Hypersonic Combustion by Standing Detonation Using Counter-Supersonic Flow

利用反超音速流的常备爆轰高超音速燃烧

基本信息

批准号：
17560696
负责人：
ISHII Kazuhiro
金额：
$ 2.24万
依托单位：
Yokohama National University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560696/
关键词：
Detonation Supersonic Flow Supersonic Combustion Shock Tunnel

项目摘要

1.Extension of the low pressure section of the present detonation driven shock tunnel resulted in longer test time from 0.7 ms to 2.0 ms, although static pressure at the nozzle exit decreases by 20 %.2.OH extinction measurement revealed that duration of supersonic air flow which is not contaminated by the driver gas is about 0.5 ms, which is much less than the theoretical value of 5 ms.3.By using the shock tube in which helium and oxyhydrogen are initially introduced in the high pressure and low pressure section, respectively, it was possible to generate a combustible supersonic flow with static pressure of 70 kPa, static temperature of 600 K, and mach number of 1.2 without spontaneous ignition of the mixture.4.In the case that detonation is introduced perpendicularly to the direction of the combustible supersonic flow, it was found that the diffracted wave front is decoupled into a shock and reaction front. After reflection of the shock front at the bottom surface of the test section, detonation is re-initiated and then propagates upstream and downstream.5.Apparent velocity of detonation in a supersonic flow is faster in the upstream area and slower in the downstream than CJ-velocity by speed of the supersonic flow.6.Smoked foil record shows that cellular structure is deformed in the direction of the supersonic flow. Experimental value of the aspect ration of the cell agrees well with the calculated one based on the CJ-velocity, the velocity of the transverse wave, and the speed of the supersonic flow.

1.当前爆炸驱动的冲击隧道的低压部分的扩张导致测试时间从0.7 ms到2.0毫秒，尽管在发出嘴出口处的静态压力降低了20％.2.OH灭绝测量持续时间，超音速空气流的持续时间揭示了驾驶员气体并不是0.5 ms污染的，这与5毫秒相比，这比5 mss. andssy andsssy andsssy andssss。最初在高压和低压段中引入的，可以产生可燃的超音速流动，静态压力为70 kPa，静态温度为600 k，马赫数为1.2，而没有自发点燃混合物。4。正面。 After reflection of the shock front at the bottom surface of the test section, detonation is re-initiated and then propagates upstream and downstream.5.Apparent velocity of detonation in a supersonic flow is faster in the upstream area and slower in the downstream than CJ-velocity by speed of the supersonic flow.6.Smoked foil record shows that cellular structure is deformed in the direction of the supersonic flow.基于CJ的速度，横波的速度和超音速流的速度，细胞的方面评分的实验值与计算出的实验值非常吻合。