有气体吹入的燃气发生器头腔充填过程仿真  

Simulation on filling process of gas generator head with gas injecting

作　　者：韩佳宁 周晨初 陆嘉伟 于锐渤 张黎辉[1] HAN Jianing;ZHOU Chenchu;LU Jiawei;YU Ruibo;ZHANG Lihui(School of Astronautics,Beihang University,Beijing 102206,China;Science and Technology on Liquid Rocket Engine Laboratory,Xi’an Aerospace Propulsion Institute,Xi’an 710100,China)

机构地区：[1]北京航空航天大学宇航学院,北京102206 [2]西安航天动力研究所液体火箭发动机技术重点实验室,西安710100

出　　处：《航空动力学报》2024年第10期455-463,共9页Journal of Aerospace Power

摘　　要：以高压补燃液氧煤油火箭发动机起动过程为背景,研究有气体吹入的燃气发生器头腔充填过程。首先通过实验,确定马尔基涅利经验关系式所需系数n为2.29,验证了经验关系式的准确性;其次利用有限元分割建立有气体吹入的燃气发生器头腔的一维分布参数模型,并将实验数据与经验关系式、一维分布模型仿真结果进行对比分析,证明了该模型的准确性。结果表明:一维分布参数模型稳态压强与实验数据平均值误差为0.429%,经验关系式(集中参数模型)误差为1.464%;喷嘴喷注面积增加,头腔内建压速度减慢,且稳定压强值降低;头腔体积增加,建压速度减慢,但压强稳定值不变;头腔摩擦因数增加,压强稳定值与充填速度降低。Based on the starting process of high-pressure combustion liquid oxygen kerosene rocket engine,the filling process of the head cavity of the gas generator with gas injecting was studied.Firstly,experiments indicated that the coefficient n required for the Marquinelli empirical relation was determined to be 2.29,which verified the accuracy of the empirical relationship.Secondly,the finite element segmentation was used to establish a one-dimensional distribution parameter model of the head cavity of the gas generator with gas injecting,and the experimental data were compared and analyzed with the empirical relationship and the simulation results of the one-dimensional distribution model,which proved the accuracy of the model.The results showed that the error between steady-state pressure and the mean value of experimental data of the one-dimensional distribution parameter model was 0.429%,and the error of the empirical relationship(centralized parameter model)was 1.464%;the flow area of the injecting increased,the pressure built into the head cavity slowed down,and the stable pressure value decreased;the volume of the head cavity increased,and the pressure building speed slowed down,but the pressure stability value was kept unchanged;the resistance coefficient of the head cavity increased,and the pressure stability value and filling speed decreased.

关 键 词：液氧煤油发动机 燃气发生器 头腔充填 有限元分割 AMESIM仿真 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]