火箭高温高速喷流注水降噪数值计算与分析  

Simulation and analysis of noise reduction in high⁃temperature and high⁃speed rocket jet by water injection

作　　者：刘俊林 徐希海 张志成[2] 陈小前[1] LIU Junlin;XU Xihai;ZHANG Zhicheng;CHEN Xiaoqian(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;Beijing Special Engineering Design and Research Institute,Beijing 100028,China;Research Institute of Aero-Engine,Beihang University,Beijing 100191,China)

机构地区：[1]国防科技大学空天科学学院,长沙410073 [2]北京特种工程设计研究院,北京100028 [3]北京航空航天大学航空发动机研究院,北京100191

出　　处：《航空学报》2023年第7期51-65,共15页Acta Aeronautica et Astronautica Sinica

基　　金：国家级项目(ZRHT2020T05);国家自然科学基金(91952302);国家科技重大专项(J2019-Ⅱ-0006-0026)。

摘　　要：以某火箭发动机缩比喷管为研究对象,针对火箭发射的典型工况,基于计算流体力学(CFD)及Mixture多相流模型分别开展了孤立火箭喷流与注水降噪条件下的平均流场数值计算。分析了注水条件下,水流对火箭喷流平均温度、压力、速度和湍动能场的影响,并在此基础上采用自主发展的基于RANS(Reynolds Averaged Navier-Stokes)的喷流噪声预测程序,在分析火箭高温燃气喷流湍流混合噪声、宽带激波噪声频谱特性和指向性的基础上,研究了注水对火箭燃气喷流湍流混合噪声与宽带激波噪声在不同频率、不同观测位置的影响规律,为后续火箭起飞降噪方案的设计提供了技术基础。Based on Computational Fluid Dynamics(CFD)and the Mixture multiphase flow model,this study con⁃ducts numerical calculation of the average flow field under the conditions of an isolated rocket jet and water injection noise reduction.The influence of water flow on the average temperature,pressure,velocity and turbulent kinetic en⁃ergy field of the rocket jet under the condition of water injection is analyzed.Reynolds Averaged Navier-Stokes(RANS)based jet noise prediction method is used to predict the spectrum and directivity of turbulent mixing noise and broadband shock noise from the jet with and without water injection.The effect of water injection on the turbulent mix⁃ing noise and broadband shock noise of the rocket gas jet at different frequencies and different observation positions is studied,providing a technical basis for the subsequent design of the rocket take-off noise reduction scheme.

关 键 词：火箭 喷流噪声 注水降噪 气动声学 多相流 

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]