液环式航空燃油离心泵自吸性能
Self-priming performance of liquid-ring aviation fuel centrifugal pump
张岭 1杨兴 1李一鸣 1王凯 2龚永祥 2刘厚林2
作者信息
- 1. 航空工业新乡航空工业(集团)有限公司,河南 新乡 453049
- 2. 江苏大学国家水泵及系统工程技术研究中心,江苏 镇江 212013
- 折叠
摘要
基于Mixture模型对液环式航空燃油泵进行自吸阶段的非稳态数值计算,研究自吸过程中燃油泵内气液两相分布的变化过程,对不同时刻下燃油泵内部含气率、气液两相分布、压力及速度流线、熵产率和湍动能变化规律进行分析.结果表明:燃油泵的吸气和排气主要集中在自吸过程的前期和中期;随着自吸时间的增加,各监测面的含气率逐渐降低,当自吸时间为3.00s时,蜗壳出口含气率接近于0,自吸过程结束;泵内压力随相对距离的增加而增大,泵内同一相对距离平面压力随自吸时间的增加而增大;在气液混合时,高速区域主要集中在叶轮中间流道和蜗壳壁面处,低速区域则集中分布在隔舌附近和导叶出口;随着自吸过程的进行,泵内湍动能和熵产率也随之增大,泵内能量损失增大,主要集中在叶轮叶片、导叶叶片和蜗壳出口处.
Abstract
The unsteady gas-liquid two-phase flow in the self-priming process of a liquid-ring aviation fuel pump was simulated using the Mixture model,and change of gas-liquid two-phase distribution in the fuel pump during the self-priming process was analyzed.The changes in gas content,gas-liquid two-phase distribution,pressure and velocity streamlines,entropy production rate,and turbulent kinetic energy in the fuel pump at different times during self-priming were studied.The results show that the suction and exhaust of the fuel pump primarily occur during the early and middle stages of the self-priming process.As the self-priming time increases,the gas content of each monitoring surface gradually decreases.When the self-priming time is 3.00 s,the gas content at the outlet of the volute approaches 0,and the self-priming process ends.The pressure inside the pump increases as the relative distance increases,and the pressure in the same relative distance plane in the pump increases with the increase of self-priming time.The high-velocity area is mainly concentrated near the partition middle flow path of the impeller and the volute wall,while the low-velocity area is concentrated in tongue of the volute and outlet of the guide vane during gas-liquid mixing.With the development of the self-priming process,the turbulent kinetic energy and entropy yield inside the pump also increase,and the energy loss inside the pump as well increases by mainly occurring in the impeller blades,guide vane blades,and outlet of the volute.
关键词
液环式航空燃油离心泵/自吸性能/含气率/熵产率Key words
liquid-ring aviation fuel centrifugal pump/self-priming performance/gas content/entropy production rate引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据