航空燃油离心泵高空吸油特性数值研究  

Numerical study on high-altitude fuel absorption characteristics of aviation fuel centrifugal pump

作　　者：李婉琦 黎义斌[1,2] 汪波 张生福 陈静波 李锦越 LI Wanqi;LI Yibin;WANG Bo;ZHANG Shengfu;CHEN Jingbo;LI Jinyue(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Advanced Pumps,Valves and Fluid Control System of the Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China;Lanzhou Wanli Aviation Electro-Mechanism Co.,Ltd.,Lanzhou 730070,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州理工大学特种泵阀及流控系统教育部重点实验室,甘肃兰州730050 [3]兰州万里航空机电有限责任公司,甘肃兰州730070

出　　处：《推进技术》2024年第12期250-261,共12页Journal of Propulsion Technology

基　　金：甘肃省军民融合发展专项资金项目;甘肃省科技计划资助:甘肃省联合科研基金重大项目(24JRRA821);甘肃省教育厅:产业支撑计划项目(2024CYZC-13)。

摘　　要：为研究不同工作高度下航空煤油特性对燃油离心泵内部流场的影响程度,引入替代模型。基于修正的SST k-ω湍流模型和Zwart空化模型,对比分析燃油泵吸油特性在不同介质温度和工作高度下的压力分布、速度流场、气体体积分数、涡量、熵产和压力脉动分布情况。研究结果表明,工作高度在0~8 km条件下介质温度对燃油泵吸油性能影响很小。工作高度大于8 km时,同一工作高度下,随着介质温度升高,燃油泵吸油能力减弱,导致内部机械能耗散效应增强。叶轮内部集中连贯的高强度涡量团破裂成为分散涡量片,叶轮前盖板区高熵产率分布面积变大。通过对蜗壳域进行压力脉动分析,叶轮对隔舌的干涉作用强度与介质温度呈正相关。当工作高度大于16 km时,空泡堵塞叶轮流道,导致燃油泵输出功率骤降。该研究验证了介质温度和工作高度对燃油泵吸油性能具有显著影响。In order to study the influence of aviation kerosene characteristics on the internal flow field of centrifugal fuel pump at different operating altitudes,an alternative model is introduced.Based on the modified SST k-ωturbulence model and Zwart cavitation model,pressure distribution,velocity flow field,vapor volume fraction,vorticity,entropy production rate and pressure pulsation distribution of fuel pump absorption character⁃istics are comparatively analyzed at different media temperatures and operating altitudes.The results show that under the condition of operating altitudes of 0~8 km,the medium temperature has little effect on the fuel absorp⁃tion performance of the fuel pump.At the same operating altitude of more than 8 km,the fuel absorption capacity of the fuel pump decreases with the increase of medium temperature,resulting in the internal mechanical energy dissipation effect being enhanced.The centralized coherent high-intensity vortex mass inside the impeller rup⁃tures into dispersed vortex sheets,and the distribution area of high entropy production rate yield in the front cover plate area of the impeller becomes larger.By analyzing the pressure pulsation of the volute domain,the interfer⁃ence intensity of the impeller on the septum is positively correlated with the medium temperature.When the oper⁃ating altitude is greater than 16 km,the cavitation blocks the impeller flow channel,resulting in a sudden drop in the fuel pump output power.This study verifies that the medium temperature and operating altitudes have a signif⁃icant influence on the fuel absorption performance of the fuel pump.

关 键 词：燃油离心泵 高空性能 涡量 熵产率 压力脉动 

分 类 号：V288[航空宇航科学技术]