节流阀中航空燃油的气液两相空化流动特性
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摘要
基于k-ε湍流模型和SIMPLE算法,将Mixture多相流模型与汽蚀模型相结合,对节流阀中的航空燃油进行气液两相定常数值模拟,研究节流阀在不同活门开度和进口压力下的空化流动特性。结果表明:随着活门开度的减小,节流阀内航空燃油的汽化区域面积增大,最大流动速度先增加后减小;航空燃油在节流阀内的进口压力越小,越容易产生气体析出和液相汽化。
Based on the k-ε turbulence model and the SIMPLE algorithm, while combining the Mixture multiphase flow model and the cavitation model, the gas-liquid two-phase constant numerical simulation is carried out for the aviation fuel in the throttle valve, to study the characteristics of cavitation flow under different valve openings and inlet pressures. The results show that with the decrease of the valve opening, the vaporization area of the fuel in the throttle valve increases and the maximum speed first increases and then decreases. The smaller the inlet pressure of the aviation fuel is in the throttle valve, the easier it is to produce gas precipitation and liquid vaporization.
Based on the k-ε turbulence model and the SIMPLE algorithm, while combining the Mixture multiphase flow model and the cavitation model, the gas-liquid two-phase constant numerical simulation is carried out for the aviation fuel in the throttle valve, to study the characteristics of cavitation flow under different valve openings and inlet pressures. The results show that with the decrease of the valve opening, the vaporization area of the fuel in the throttle valve increases and the maximum speed first increases and then decreases. The smaller the inlet pressure of the aviation fuel is in the throttle valve, the easier it is to produce gas precipitation and liquid vaporization.
引文
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[4]Park C,Seol H,Kim K,et al.A study on propeller noise source localization in a cavitation tunnel[J].Ocean Engineering,2009,36(9):754-762.
[5]Liu Y H,Ji X W.Simulation of cavitation in rotary valve of hydraulic power steering gear[J].Science in China,2009,52(11):3142-3148.
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