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推力调节球阀流量特性参数化建模

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调节阀广泛应用于工业自动化领域,用于精确控制流体的流量、压力、温度等参数.应用于可重复使用液氧/甲烷发动机推力调节系统的推力调节阀,为浮动阀座矩形窗口球阀,通过控制进入燃气发生器的甲烷及液氧流量来调节涡轮泵的功率,从而实现推力调节.首先对调节阀的流量特性进行理论建模.通过参数化分析调节阀阀座和阀芯的流通特性,提出了一种理论模型来预测阀的流量系数.采用CFD仿真和实验测定方法验证理论模型,并对比理论值、仿真值和测量值.结果表明,理论模型能较好地预测中等开度下的流量系数,但在极小和极大开度下存在偏差.最后指出了进一步研究和改进的方向,以提高模型在极端开度下的准确性.
Parameterized Modeling of Flow Characteristics of Thrust Regulating Ball Valves
Regulating valves are widely used in the field of industrial automation,for precise control of fluid flow,pressure,temperature and other parameters.The thrust regulating valve applied to the thrust control system of reusable liquid oxygen/methane engine is a floating seat rectangular-opening ball valve,which regulates the power of the turbine pump by controlling the flow of methane and liquid oxygen into the gas generator,thereby achieving thrust regulation.Firstly,theoretical modeling of the flow characteristics of the regulating valve.A theoretical model is proposed to predict the flow coefficient of the regulating valve by parameterizing the flow characteristics of the valve seat and spool.The theoretical model is validated using CFD simulation and experimental measurement methods,and the theoretical values,simulation values,and measurement values are compared.The results show that the theoretical model can predict the flow coefficient well at medium opening,but there are deviations at very small and very large opening.Finally,further research and improvement directions are pointed out to improve the accuracy of the model at extreme opening.

regulating ball valveflow characteristicstheoretical modelCFD simulation

何广、许健、付剑

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北京航空航天大学机械工程及自动化学院,北京 100191

北京航天动力研究所,北京 100076

调节球阀 流量特性 理论模型 CFD仿真

2024

液压与气动
北京机械工业自动化研究所

液压与气动

CSTPCD北大核心
影响因子:0.453
ISSN:1000-4858
年,卷(期):2024.48(9)
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