脉冲爆震发动机最大净推力和最佳工作频率

推进技术 ›› 2004, Vol. 25 ›› Issue (6): 543-548.

脉冲爆震发动机最大净推力和最佳工作频率

李建中,王家骅,范育新,张靖周,张义宁

南京航空航天大学能源与动力学院江苏南京210016;南京航空航天大学能源与动力学院江苏南京210016;南京航空航天大学能源与动力学院江苏南京210016;南京航空航天大学能源与动力学院江苏南京210016;南京航空航天大学能源与动力学院江苏南京210016

发布日期:2021-08-15

Maximal net thrust and optimal frequency of pulse detonation engine

Coll.of Energy and Power, Nanjing Univ.of Aeronautics and Astronautics,Nanjing 210016, China;Coll.of Energy and Power, Nanjing Univ.of Aeronautics and Astronautics,Nanjing 210016, China;Coll.of Energy and Power, Nanjing Univ.of Aeronautics and Astronautics,Nanjing 210016, China;Coll.of Energy and Power, Nanjing Univ.of Aeronautics and Astronautics,Nanjing 210016, China;Coll.of Energy and Power, Nanjing Univ.of Aeronautics and Astronautics,Nanjing 210016, China

Published:2021-08-15

摘要/Abstract

摘要： 为研究气动阀式脉冲爆震发动机净推力和工作频率之间的变化规律,建立了PDE净推力的近似计算模型。通过计算和试验的方法,研究了PDE能够达到的最大净推力及相应的最佳工作频率,以及爆震管长度L和PDE的阻力经验系数K1,K2等因素对PDE的最大净推力、最佳工作频率的影响。结果表明:L,K1,K2一定,PDE存在一个最佳工作频率fopt,在该频率下,PDE净推力最大。随着L增加,fopt下降;随着K1,K2增加,fopt和最大净推力都下降。研究结果对于PDE优化设计,提高PDE的工作性能具有重要的参考价值。

关键词: 脉冲爆震发动机;推力;阻力系数;工作频率

Abstract: In order to investigate variational rule between net thrust and frequency of pulse detonation engine, a mathematic model for the net thrust of PDE is established.By means of the calculation and experiment, the maximum net thrust and the corresponding optimal frequency are analyzed, and the effects of detonation chamber length L,drag coefficients K₁ and K₂ on the maximum net thrust and the optimal operation frequency are analyzed.The results show that there is an optimal frequency of PDE and a corresponding maximum net thrust when L,K₁ and K₂ are constants.The optimal frequency decreases with the increasing value of L and the optimal frequency and the maximum net thrust all decline with the increasing value of K₁ and K₂.This investigation is helpful to optimize the design of PDE and to improve the performance of PDE.

Key words: Pulse detonation engine;Thrust~+;Drag coefficient;Operating frequency

李建中,王家骅,范育新,张靖周,张义宁. 脉冲爆震发动机最大净推力和最佳工作频率[J]. 推进技术, 2004, 25(6): 543-548.