注水参数对火箭喷流流场的影响规律研究  

Research on the influence of water injection parameters on flow field of rocket jets

作　　者：刘俊林 张子赫 张志成[1] 徐希海 LIU Junlin;ZHANG Zihe;ZHANG Zhicheng;XU Xihai(Beijing Special Engineering Design and Research Institute,Beijing 100028,China;School of Energy and Power Engineering,Beihang University,Beijing 100191,China;Research Institute of Aero-Engine,Beihang University,Beijing 100191,China)

机构地区：[1]北京特种工程设计研究院,北京100028 [2]北京航空航天大学能源与动力工程学院,北京100191 [3]北京航空航天大学航空发动机研究院,北京100191

出　　处：《航空动力学报》2023年第10期2415-2429,共15页Journal of Aerospace Power

基　　金：专项课题(ZRHT2020T05);国家科技重大专项(J2019-Ⅱ-0006-0026);航空发动机及燃气轮机基础科学中心项目(P2022-B-Ⅱ-012-001)。

摘　　要：为了研究火箭起飞时不同注水参数对火箭尾焰喷流流场的影响规律,以某火箭发动机缩比喷管为研究对象,基于计算流体力学(CFD)方法及Mixture多相流模型开展了注水时单喷管火箭喷流流场的数值计算研究。以注水速度、流量、位置等注水条件为变量,量化分析了注水对火箭喷流平均温度、压力、速度和湍动能场的影响。结果表明:注水速度大于30 m/s时,可有效降低喷管射流的温度和速度,当注水速度低于20 m/s时,注水对喷流轴线上物理量的影响变小;注水速度为30 m/s,且流量大于2.2倍喷管射流秒流量时,可以有效降低喷管射流温度和速度;注水与喷流作用点位于喷管射流前三个激波位置时,注水对喷流降温降速效果较好,且作用点越靠近上游,对喷管射流的影响越明显,但实际工程应用中应避免注水溅到喷管上。A study on the effects of different water injection conditions on the jet flow field of a rocket model was performed.The numerical calculation of the jet flow field of a single nozzle rocket during water injection was carried out based on the computational fluid dynamics(CFD)and Mixture model.The effects of water injection on average temperature,pressure,velocity and turbulent kinetic energy field of rocket jet were analyzed in different water injection velocities and flow rate conditions.The results showed that when the water injection speed was greater than 30 m/s,the temperature and speed of the nozzle jet can be effectively reduced.When the water injection speed was lower than 20 m/s,the influence of water injection on physical quantity of the jet axis became smaller.When the water injection speed was 30 m/s and the flow rate was more than 2.2 times the nozzle jet second flow rate,the nozzle jet temperature and speed can be effectively reduced.When the action point of water injection and the jet were located at the first three shock wave positions of the nozzle jet,the water injection had a good effect on the jet cooling and velocity reduction,and the closer the operation point was to the upstream,the more obvious the impact on the nozzle jet was.However,in practical engineering applications,the injection should avoid splashing on the nozzle.

关 键 词：火箭喷流 注水 气液多相流 喷流流场 降温降速 

分 类 号：V411.6[航空宇航科学与技术—航空宇航推进理论与工程]