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- 2016
加力燃油离心泵关死点工况引射冷却分析
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Abstract:
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。
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.
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