Pressure History at the Thrust Wall of a Simplified Pulse Detonation Engine
Pressure History at the Thrust Wall of a Simplified Pulse Detonation Engine
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DOI：
10.2514/1.976
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发表时间：
2004-09
期刊：
影响因子：
2.5
通讯作者：
T. Endo;J. Kasahara;A. Matsuo;K. Inaba;Shigeru Sato;T. Fujiwara
中科院分区：
文献类型：
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作者：
T. Endo;J. Kasahara;A. Matsuo;K. Inaba;Shigeru Sato;T. Fujiwara
对简化脉冲爆震发动机（PDE）中的气体动力学进行了理论分析。偏微分方程被简化为具有固定横截面的直管。管子一端封闭，即这一端为止推壁，另一端敞开。爆轰波在封闭端引发，同时开始向开放端传播。当爆轰波从开口端爆发时，稀疏波开始从开口端向封闭端传播。这种稀疏波被封闭端反射。通过在分析稀疏波与其封闭端反射之间的干涉时考虑该稀疏波是自相似的，我们在没有任何经验参数的情况下解析地公式化了封闭端（推力壁）处压力历史的衰减部分。通过将推力壁处获得的压力历史相对于时间进行积分，还制定了偏微分方程的重要性能参数。将得到的公式与数值和实验结果进行了比较，结果非常吻合。
Gas dynamics in a simplified pulse detonation engine (PDE) was theoretically analyzed. A PDE was simplified as a straight tube with a fixed cross section. One end of the tube was closed, namely, this end was the thrust wall, and the other end was open. A detonation wave was initiated at the closed end and simultaneously started to propagate toward the open end. When the detonation wave broke out from the open end, a rarefaction wave started to propagate from the open end toward the closed end. This rarefaction wave was reflected by the closed end. By considering this rarefaction wave to be self-similar in the analysis of the interference between this rarefaction wave and its reflection from the closed end, we analytically formulated the decay portion of the pressure history at the closed end (thrust wall) without any empirical parameters. By integrating the obtained pressure history at the thrust wall with respect to time, important performance parameters of a PDE were also formulated. The obtained formulas were compared with numerical and experimental results and agreed with them very well.