| 导流角对激波聚焦起爆爆震的影响 |
| |
| 引用本文： | 赵坤,曾昊,何立明,刘圣平,付春光.导流角对激波聚焦起爆爆震的影响[J].航空动力学报,2017,32(9):2118-2124. |
| |
| 作者姓名： | 赵坤 曾昊 何立明 刘圣平 付春光 |
| |
| 作者单位： | 空军工程大学 航空航天工程学院,西安 710038 |
| |
| 基金项目： | 国家自然科学基金（91541109,51406234）; 陕西省自然科学基金（2015JQ5124） |
| |
| 摘 要： | 为研究两级脉冲爆震发动机环形射流入口导流角对激波聚焦起爆爆震的影响,以H2/O2/N2混合气为介质,对不同导流角下激波聚焦起爆爆震的过程进行了数值模拟,并开展导流角对激波聚焦起爆爆震影响的冷态实验,共同揭示其影响规律。结果表明:导流角越大,射流碰撞压力和温度越高,碰撞时间提前,更容易起爆爆震,但激波聚焦时间在导流角大于11°时基本不变；导流角越大,凹面腔内气流振荡频率越大,凹面腔底部的动压幅值越小。
|
| 关 键 词： | 两级脉冲爆震发动机 激波聚焦 爆震波 导流角 冷态实验 |
| 收稿时间： | 2016/9/9 0:00:00 |
Effects of deflector angle on initiating detonation by shock wave focusing |
| |
| ZHAO Kun,ZENG Hao,HE Liming,LIU Shengping,FU Chunguang.Effects of deflector angle on initiating detonation by shock wave focusing[J].Journal of Aerospace Power,2017,32(9):2118-2124. |
| |
| Authors: | ZHAO Kun ZENG Hao HE Liming LIU Shengping FU Chunguang |
| |
| Abstract: | In order to investigate the effect of annular jet inlet deflector angle on initiating detonation by shock wave focusing in a two stage pulse detonation engine, initiating detonation with different deflector angles were simulated with H2/O2/N2 mixture. Cold experimental was also carried out on the effect of deflector angle on initiating detonation by shock wave focusing. The results indicate that, as deflector angle increases, the jet collision temperature and jet collison pressure is higher, the jet collision time is earlier and initiating detonation is easier, but the shock wave focusing time remains unchanged when the deflector angle is bigger than 11°. And as deflector angle increases, airflow oscillating frequency in the concave cavity increases and dynamic pressure amplitude at the bottom of the cavity decreases. |
| |
| Keywords: | two-stage pulse detonation engine shock wave focusing detonation wave deflector angle cold experiment |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
|
