【摘要】 针对加力燃油离心泵关死点工况存在燃油温升高的问题,采用从泵入口引入一小股旁路燃油引射冷却叶轮腔室的设计。运用Reynolds时均(RANS)方法,结合剪切应力输运(SST)湍流模型和Rayleigh-Plesset空化模型,对加力燃油离心泵引射冷却降温进行了分析。结果表明:采用旁路燃油引射冷却叶轮腔室的设计,可以有效解决加力燃油离心泵关死点工况燃油温升高的问题。采用引射装置的加力燃油离心泵,在叶轮中心存在气心,使加力燃油离心泵消耗的功率减小,叶轮摩擦产生的热量也变小,因此燃油温升降低。更多还原

【Abstract】 The high fuel temperature rise at the shut-off operating condition in a reheat fuel centrifugal pump is addressed by cooling the impeller by fuel flowing through a by-pass from the pump inlet.The ejection-cooling is analyzed using the Reynolds average Navier-Strokes(RANS)method with the shear stress transport(SST)turbulence model and the Rayleigh-Plesset cavitation model.The results show that the ejection-cooling design can reduce the high fuel temperature rise at the shut-off condition. The power consumption and the friction heat are both reduced in the reheat fuel centrifugal pump with the ejection-cooling device because of the vapor core region in the impeller central zone which reduces the fuel temperature rise.更多还原