扰动进口影响多重旋转爆轰波演化及振荡特性的数值研究  

Numerical investigation on influence of perturbation inlet on evolution and oscillation characteristics of multiple rotating detonation waves

作　　者：陈煌威 吴宇 李润泽 胡洪波 朱跃进[1] CHEN Huangwei;WU Yu;LI Runze;HU Hongbo;ZHU Yuejin(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China;Science and Technology on Liquid Rocket Engine Laboratory,Xi’an Aerospace Propulsion Institute,Xi’an 710100,China)

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013 [2]西安航天动力研究所液体火箭发动机技术重点实验室,陕西西安710100

出　　处：《推进技术》2024年第11期119-129,共11页Journal of Propulsion Technology

基　　金：国家自然科学基金(12272152)。

摘　　要：基于OpenFOAM开源平台,研究了周期性扰动进口对旋转爆轰发动机(RDE)多重爆轰波的演化及振荡特性的影响。结果表明:对于进口扰动的旋转爆轰波(RDW)传播过程先后分为三个阶段,分别是混乱阶段、自调整阶段和振荡传播阶段。通过改变扰动振幅,RDW的波数改变,传播方向并未改变;而改变扰动频率,RDW的波数和传播方向均发生变化。多重爆轰波起源于RDW的混乱传播,主要通过双波对撞进行RDW的波数和方向的调整。同时通过改变扰动振幅和频率讨论RDW传播特性,发现进口扰动将作用于旋转爆轰波的压力、传播速度和热释放速率,并且在本文研究中,改变扰动振幅对RDW传播特性的影响更显著。另外,对出口的推力进行分析,发现质量流量和推力的振荡形式和进口扰动形式高度一致,且增大扰动振幅,平均比冲相应增大。A numerical simulation using the open-source platform OpenFOAM is conducted to investigate the influence of periodic perturbations at the inlet on the evolution and oscillation characteristics of multiple rotat⁃ing detonation waves(RDWs)for rotating detonation engine(RDE).The results indicate that the propagation of the RDW in the presence of inlet perturbations can be categorized into three stages:chaotic propagation,self-ad⁃justment,and oscillatory propagation.Changing the perturbation amplitude alters the wave number of RDWs while keeping the propagation direction unchanged.Modifying the perturbation frequency affects both the wave number and propagation direction of RDWs.The generation of multiple detonation waves stems from the chaotic propagation of the RDW and is primarily regulated by double wave interactions to adjust the wave number and di⁃rection.Through an examination of the impact of perturbation amplitude and frequency on RDW propagation char⁃acteristics,it is observed that inlet perturbations affect the pressure,propagation velocity,and heat release rate of the RDW.Notably,the perturbation amplitude has a more pronounced effect on RDW propagation characteris⁃tics.Additionally,an analysis of the exhaust thrust reveals a strong correlation between the oscillation pattern of mass flow rate,thrust and the characteristics of the inlet perturbations.Furthermore,increasing the perturbation amplitude corresponds to an amplified specific impulse.

关 键 词：旋转爆轰波 周期性扰动 多重爆轰波 振荡传播 振荡特性 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程] O381[理学—流体力学]