基于CFD的某运载火箭发动机燃料泵故障诊断分析.pdf

上海航天
AERI SPACE SHANGHAI
第33卷2016年第2期
文章编号:1006-1630(2016)02-0068-05
基于CFD的某运载火箭发动机燃料泵故障诊断分析
陈雪菟,汪轶俊,何莴,焦、震
(1.上海字航系统工程研究所,上海201109:2.上海航天技术研究院,上海201109)
摘要:对某运載火箭燃料泵后压力异常故障进行诊断分析。米闭混合两相流模型、气蚀模型、多参考系模型
对燃料离心系内流场和气蚀过程进行三维数值仿真,给出了燃料泵正常、无导流套和不司尺寸多余物工况的流动
特性,分析了不同工况的出ロ压力、流望、气做发生位置和空间分布。分析結果表明:燃泵无导流套对出口压力
影响较小;多余物进入诱导轮内会产生严重气蚀,同时出口压力和流量均显著下降,并随多余物尺寸増大而加別
诊断结果对认识高速离心泵内燃补流动,分析多余物引起的故障,预并克服气蚀发生有一定的参考价值
关词:燃离心泵;数值模拟;故摩诊断;气帔;多余物
中图分类号:V434.212文献标志码:A
DOI:10.19328/j.cnki.1006-1630.2016.02.013
Faulty Analysis of a Centrifugal Pump for Some Liquid Rocket Engine Based on CFD
CHEN Xue-wei, WANG Yijun, HE Gang, JIAO Zhen
1. Aerospace System E
ng Shanghai, Shangha
China
2. Shanghai Academy of Spaceflight Technology, Shanghai 201109, China>
Abstract: The failure reason of the lower pressure of thc UDMII centrifugal pump outlet [or some launch vehicle
was investigated in this paper. The 3D numerical simulation for the flow field and cavitations in the centrifugal pump
was carried out by mixture model, cavitation model and m: ultiple reference frame method. The analysis results of the
flow characteristics in the normal casc. ncn-diversicn impeller case, and a set of different size remainder particles
cases were given out, and the pressure, flux anc cavitations region in the various cases were presented. The CFD
results showed thal there was little influence for the pressure of the pump outlet in the non-diversion impeller case
and the remainder particle entering the inducer would rause serious cavitations, the ressure and flux of pump outlet
decreased enormously which would become intensified while the remainder particles size increasing. The fult
diagnosis was very helpful fo understanding propellant flow in high-speed centrifugal pumps and predicting
cavitation
Keywords: Centrifugal pump; Numerical simulation; Fault diagnosis; Cavitation; Rcmainder particle
心涡轮泵时,极有可能发生严重气蚀并产生大量气
涡轮泵是液体火籥发劝机的重要组成部分,它泡,从而异致离心泵的功率、效率、流量、扬程或泵后
抽出贮箱中的低压推进剂,将推进剂压力提高后送压力等急剧下降,甚至可能使发动机不能正常工作。
入推力宰和燃气发生器。涡轮泵的性能及可靠性直因此,有必要就泵内多余物对泵的流动特性及性能
接影响个发动机系统的正常工作。气蚀是在一定产生的影响进行研究。随着计算流体力学(CFD)的
温度下,当地液体压力低于饱和蒸汽压而发生蒸发发展,离心泵内的流动特性已有较充分的研究,对在
相变产生空泡,连续相遭到破坏的现象。当外来多泵内非气蚀和气蚀流动进行了大量的研究、但多数
余物或发动机自身携带的多余物进人高遮旋转的离仅计算泵在正常工作状态或出人口流量、压力等边
收稿日期:2015-06-18;修回日期:2C16-02-23
界条件发生变化时的流动特性,较少研究泉自身缺
作者简介:陈雪(195-),?,」,主要从事飞行器气动和液陷或多余物进人离心泵内后对泵的流动特性的影
体动设计。
响。泵自身缺陷或多余物进入泵内对流动特性
万方数据