水射流介入多组分喷流降噪仿真研究  

Numerical analysis of noise reduction of multi-components jet with water inserts

作　　者：李俊 刘振[1] 胡迪科 党天骄 董龙雷[1] LI Jun;LIU Zhen;HU Dike;DANG Tianjiao;DONG Longlei(School of Aerospace Engineering,Xi'an Jiaotong University,710049 Xi'an,China;Shanghai Institute of Aerospace Systems Engineering,201109 Shanghai,China)

机构地区：[1]西安交通大学航天航空学院,西安710049 [2]上海宇航系统工程研究所,上海201109

出　　处：《应用力学学报》2022年第2期375-385,共11页Chinese Journal of Applied Mechanics

摘　　要：火箭在发射升空阶段,由喷管喷出的高超声速射流诱导产生的高量级喷流噪声,严重影响火箭结构安全性和仪器设备的可靠性,因此开展高速喷流噪声环境的预测和降噪具有重要意义。针对某型液体火箭发动机喷流,采用脱体涡模型(DES)结合输运方程及离散相模型(DPM)、曲面积分的FW-H(Ffowcs Williams-Hawkings)方程,建立了多组分高马赫数喷流噪声及考虑蒸发物理机制的水射流介入多组分高马赫数喷流的数值分析方法,完成了液体火箭发动机高超声速喷流流场及喷流噪声环境的预测,结果显示在测点处总声压级预测结果与试验测量结果误差在±3 dB之内。进一步设计了环形水射流喷流降噪系统,开展了考虑蒸发物理效应和复杂导流槽构型影响下的水射流介入高速喷流降噪规律研究,发现水射流对燃气射流产生剪切作用、动量交换作用以及吸热蒸发作用是实现降噪效果的重要原因,降噪效果随水射流质量流率增大单调升高,而随介入角度的增大先升后降。本研究对水射流介入系统的设计与工程实践具有重要意义。The high-level rocket lift-off noise induced by the hypersonic jet has adverse impacts on the structural security and equipment reliability of the rocket;therefore,it is of great significance to make the prediction and reduction of high-speed jet noise environment.A numerical analysis method based on detached eddy simulation(DES)turbulence model and combined transport equation,discrete phase model(DPM)and FW-H equation was established to calculate the noise of multi-components rocket jet and water considering evaporation inserts multi-components high speed jet.The prediction pf hypersonic jet flow condition and noise environment of liquid rocket engine was completed.The results show that the error between the predicted results and experimental results of overall sound pressure level of probes is within±3 dB.Furthermore,the annular water inserts noise reduction system was designed,the noise reduction law of water involved in high Mach number jet,considering evaporation effect and influence of complex deflector duct configuration,was studied,which reveals that shearing effect,momentum transfer and evaporation are important incentives for noise reduction.Besides,the noise suppression effect increases monotonously with the increase of mass flow rate,and increases first and then decreases with the increase of intervention angle.This study is of great importance in design and engineering of the water inserts system.

关 键 词：多组分火箭喷流 水射流介入降噪 噪声预测 介入角度 质量流率 数值仿真 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]