带凹腔的旋转爆震发动机的工作特性研究  

Investigation on Operation Characteristics of Rotating Detonation Engine With Cavity

作　　者：周剑平 宋飞龙 吴云[1,2] 郭善广 康晋辉 陈琪 ZHOU Jianping;SONG Feilong;WU Yun;GUO Shanguang;KANG Jinhui;CHEN Qi(National Key Lab of Aerospace Power System and Plasma Technology,Air Force Engineering University,Xi’an 710038,China;Institute of Aeroengine,School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]空军工程大学航空动力系统与等离子体技术全国重点实验室,西安710038 [2]西安交通大学机械工程学院航空发动机研究所,陕西西安710049

出　　处：《工程热物理学报》2025年第1期114-119,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金青年科学基金项目(No.52106190)。

摘　　要：本文研究了收敛喷管对带凹腔的旋转爆震发动机工作特性的影响。采用互相关算法对爆震波传播模态进行识别,根据自相关的单圈时滞定义爆震波传播稳定性参数。通过燃烧室出口平均静压和马赫数计算燃烧室出口总压,进而得到总压恢复系数。随着喷管出口面积的降低,可爆当量比下边界会降低。爆震波传播稳定性受喷管的影响较小。降低喷管出口面积,有利于提高爆震波传播速度和旋转爆震发动机的总压恢复系数。The effect of convergent nozzle on the operation characteristics of rotating detonation engine with cavity is investigated.The cross-correlation algorithm is applied to identify the propagation mode of detonation wave,and the stability parameters of detonation wave propagation are defined according to the loop delay of the auto-correlation.The total pressure at the combustor outlet is calculated by the average static pressure and Mach number,and then the total pressure recovery coefficient is obtained.With the decrease of nozzle outlet area,the lower boundary of detonable equivalent ratio will decrease.The stability of detonation wave propagation is less affected by the nozzle.The reduction of the nozzle outlet area is beneficial to increasing the velocity of detonation wave and the total pressure recovery coefficient of rotating detonation engine.

关 键 词：旋转爆震发动机 收敛喷管 凹腔 总压恢复系数 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]