| 引用本文: | 王超,刘卫东,刘世杰,等.连续旋转爆震波传播模态试验.[J].国防科技大学学报,2015,37(4):121-127.[点击复制] |
| WANG Chao,LIU Weidong,LIU Shijie,et al.Experiment on the propagation mode of continuous rotating detonation wave[J].Journal of National University of Defense Technology,2015,37(4):121-127[点击复制] |
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| 连续旋转爆震波传播模态试验 |
| 王超, 刘卫东, 刘世杰, 林志勇, 蒋露欣 |
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(国防科技大学 高超声速冲压发动机技术重点实验室， 湖南 长沙 410073)
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| 摘要: |
| 通过保持空气流量不变、改变H2/air当量比开展了连续旋转爆震对比试验，发现随当量比的降低出现三种传播模态：在较高的当量比(0.90～1.86)下，连续旋转爆震波以同向传播模态传播；在较低的当量比（≈0.75）下，则以双波对撞模态传播；在中间工况，则以上述混合模态维持传播。分析了不同传播模态下的高频压力特征，并初步分析了传播模态的转换机制：当量比较高时，爆震强度较高，传播过程中的损失和速度亏损相对较小，爆震波以同向传播模态维持传播；当量比较低时，爆震强度较低，传播过程中的损失和速度亏损较大，此时无法维持同向传播模态，而以双波对撞模态传播，这是由于双波对撞模态中的激波对撞产生高温环境，有利于燃烧放热，其可能是连续旋转爆震的极限传播模态。 |
| 关键词: 连续旋转爆震 同向传播模态 双波对撞模态 速度亏损 模态转换 |
| DOI：10.11887/j.cn.201504021 |
| 投稿日期：2014-09-17 |
| 基金项目:国家自然科学基金资助项目（51306202，91216120） |
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| Experiment on the propagation mode of continuous rotating detonation wave |
| WANG Chao, LIU Weidong, LIU Shijie, LIN Zhiyong, JIANG Luxin |
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(Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Experiments on continuous rotating detonation wave of H2/air were performed with constant air mass flow rate and varied H2/air equivalence ratio(ER). Three different propagation modes of the continuous rotating detonation wave were found as the decreasing of ER, namely, one direction mode at high ER from 0.90 to 1.86, two-wave collision propagation mode at low ER of about 0.75, hybrid mode of one direction mode and two-wave collision propagation mode at middle ER. The propagation characteristics of the high-frequency pressures were analyzed and the mode transition mechanism of continuous rotating detonation wave was preliminarily studied. With a higher ER, the strength of the detonation wave is increased and the loss and velocity deficit during the propagation are relatively small, and the continuous rotating detonation wave can be sustained in the one direction mode; while with a lower ER, the strength of the continuous rotating detonation wave is reduced and the influence of the loss and velocity deficit during the propagation is relatively enlarged, only in the two-wave collision propagation mode can the continuous rotating detonation wave be sustained. This can be attributed to the collision of the two counter-propagating shock waves in the two-wave collision propagation mode, which will promote the heat release, will enable the continuous rotating detonation wave to propagate steadily at a low ER, and will make the two-wave collision propagation mode possibly be the ultimate propagation mode of continuous rotating detonation wave. |
| Keywords: continuous rotating detonation one direction propagation mode two-wave collision propagation mode velocity deficit mode transition |
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