深度变推力发动机氧泵工作适应性仿真研究  

Adaptability Investigation for Oxygen Pump in Deep Throttling Engines

作　　者：沈文金[1] 蒋文山 韩英杰[2] Shen Wen-jin;Jiang Wen-shan;Han Ying-jie(Beijing Aerospace Propulsion Institute,Beijing,100076;Fushun Petrochemical Company,CNPC,Fushun,113004)

机构地区：[1]北京航天动力研究所,北京100076 [2]中国石油抚顺石化公司石油二厂,抚顺113004

出　　处：《导弹与航天运载技术》2018年第5期36-39,共4页Missiles and Space Vehicles

摘　　要：采用数值计算方法进行氧泵设计工况的全流场仿真计算,拟合了流量-扬程-转速特性曲线计算公式;根据发动机系统10%～100%变推力要求,采用拟合公式计算得到氧泵变工况工作转速,并进行变工况适应性仿真研究。结果表明:相比额定转速变工况流场分布,变转速、变工况时氧泵流场均匀性大幅提高,叶片流动分离显著降低,氧泵效率曲线平稳,高效率区较宽;氧泵具有良好的稳定性和变工况适应性,可以满足发动机的深度变推力要求。Numerical analysis of the entire flow field is conducted at the design point for the Oxygen pump,and fitted flow-head-speed formula according to the computational data points.The rotating speeds of oxygen pump in variable operation conditions are calculated by the fitted formula based on the 10%~100%variable thrust requirements,which is proposed by the engine system,and variable thrust adaptability studies are numerical analyzed.The results demonstrated that the oxygen pump flow field became more homogeneous,along the blades the separation regions became smaller,efficiency curve changed stably with wider high-efficiency-area under the conditions of variable speed and working condition compared with distribution of liquid flow-field of variable speed under the rated conditions.Oxygen pump possesses desirable stability performance and stronger load adaptability,could satisfy the deep range of variable thrust requirements of the engine.

关 键 词：液体火箭发动机 深度变推 氧泵 

分 类 号：V43[航空宇航科学与技术—航空宇航推进理论与工程]