Propulsive performance of airbreathing pulse detonation engines
Propulsive performance of airbreathing pulse detonation engines
复制标题
DOI：
10.2514/1.21755
复制
发表时间：
2006-11
影响因子：
1.9
通讯作者：
F. Ma;Jeong-Yeol Choi;V. Yang
中科院分区：
文献类型：
--
作者：
F. Ma;Jeong-Yeol Choi;V. Yang
通过综合分析/数值分析来评估吸气式脉冲爆震发动机在选定飞行条件下的推进性能。这项工作处理轴对称坐标中的守恒方程，并考虑化学计量的氢/空气混合物的有限速率化学和可变热物理性质。此外，建立了考虑脉冲爆震发动机运行中工作流体状态变化的分析模型，以预测理想情况下的发动机性能。所考虑的系统包括超音速入口、空气歧管、阀门、爆震管和收敛-扩散喷嘴。阀门操作可采用内部和外部两种模式。探索了详细的流程演变，并识别和量化了各种性能损失机制。系统地研究了所有已知效应（例如气门操作正时、反应物填充分数、喷嘴配置和飞行条件）对发动机推进性能的影响。在 1.2-3.5 的飞行马赫数上建立了性能图。结果表明，对于本文考虑的所有飞行条件，脉冲爆震发动机均优于冲压喷气发动机。脉冲爆震发动机的优势在低超音速条件下非常显着，但随着飞行马赫数的增加而逐渐减弱。
The propulsive performance of airbreathing pulse detonation engines at selected flight conditions is evaluated by means of a combined analytical/numerical analysis. The work treats the conservation equations in axisymmetric coordinates and takes into account finite-rate chemistry and variable thermophysical properties for a stoichiometric hydrogen/air mixture. In addition, an analytical model accounting for the state changes of the working fluid in pulse detonation engine operation is established to predict the engine performance in an idealized situation. The system under consideration includes a supersonic inlet, an air manifold, a valve, a detonation tube, and a convergent-divergent nozzle. Both internal and external modes of valve operation are implemented. Detailed flow evolution is explored, and various performance loss mechanisms are identified and quantified. The influences of all known effects (such as valve operation timing, filling fraction of reactants, nozzle configuration, and flight condition) on the engine propulsive performance are investigated systematically. A performance map is established over the flight Mach number of 1.2-3.5. Results indicate that the pulse detonation engine outperforms ramjet engines for all the flight conditions considered herein. The benefits of pulse detonation engines are significant at low-supersonic conditions, but gradually decrease with increasing flight Mach number.