Effect of inlet-valve structures on thrust of airbreathing pulse detonation engines

查看全文 作　　者：Wenjuan [1]Chen;Wei [2]Fan;Feiteng [1]Luo;Gaohu [2]Tang;Yaosong [1]Long

机构地区：[1]School of Aerospace Engineering,Huazhong University of Science and Technology,Wuhan,430074,China;[2]School of Power and Energy,Northwestern Polytechnical University,Xi’an,710072,China

出　　处：《Propulsion and Power Research》索引2021年第10卷第4期,共15页

基　　金：the National Natural Science Foundation of China(91441201);the Fundamental Research Funds for the Central Universities(5003123003)for financial supports of this work. 摘　　要：Experimental studies were conducted in order to improve the understanding of the thrust generation and the pressure/flame reverse propagation of the air-breathing pulse detonation engines(APDEs)with self-designed inlets and valves structures.The present experimental research utilized a gasoline/air APDE(with 68 mm inner-diameter,2050 mm length and maximum operating frequency not less than 40 Hz which was as a benchmark structure)at different operating frequencies,with freestream air inflow of 1.1 atm and 0℃.The theoretical equivalence ratio of gasoline/air was 1.Two kinds of inlets with centerbody or without were considered and combined with two kinds of self-designed valves(the elastic-valve and the convergent aero-valve)specially designed for comparative experiments.During the test,the inflow parameters,the pressure along the longitudinal direction inside the engine and the thrust force were measured for the APDE operating characteristic analysis,including the detonation combustion,the aerodynamic drag,the pressure/flame reverse propagation and the thrust generation.The research results indicate that:The inlet centerbody does not increase drag but plays a positive effect on airflow stability and operation matching.The elastic-valve and the convergent aero-valve,though increase the inlet aerodynamic drag,have obvious effects on suppressing the detonation wave and pressure forward propagation,resulting in effective thrust increase.Effects of the convergent aero-valve are the best when the flow choked,while the effects of elastic-valve are better and continuously stable in a wider range of frequency.The wmaximum nondimensional thrust increases with the elastic-valve is reached about 1.12 at the frequency of 8-9 Hz,and about 0.97 with the convergent aero-valve at the frequency of 7 Hz.The maximum fuel specific impulse is 2514.6 s when using the convergent aerovalve.And this study provides technical reserve for the APDE optimization design. 关键词：Air-breathing pulse detonation engine Elastic-valve Convergent aero-valve Thrust augmentation Pressure/flame reverse propagation

相关文献

参考文献（63）
引证文献（2）
耦合文献（26）

参考文献(63)

引证文献(2)

耦合文献(26)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Effect of inlet-valve structures on thrust of airbreathing pulse detonation engines

参考文献(63)

引证文献(2)

耦合文献(26)

用户提示