基于CFD的电动燃油泵V锥流量计结构优化  

Structural optimization of the electric fuel pump V-cone flow meter based on CFD

作　　者：汤宇佳 叶志锋[1] 王欣 周力 TANG Yujia;YE Zhifeng;WANG Xin;ZHOU Li(College of energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;AECC Guizhou Honglin Aviation Power Control Technology Co.,Ltd.,Guiyang 550009,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]中国航发贵州红林航空动力控制科技有限公司,贵阳550009

出　　处：《燃气涡轮试验与研究》2024年第5期55-62,共8页Gas Turbine Experiment and Research

摘　　要：电动燃油泵是航空发动机向多电化发展的一个关键部件,为对电动燃油泵燃油流量进行精准测量,实现航空发动机燃油流量精准控制以有效提升发动机性能,考虑到传统流量计无法满足发动机内大量程比需求及狭窄安装条件,对V锥流量计进行航空发动机应用环境下的结构参数选择与优化。根据大量程流量范围所需压差选择固定的等效直径比(β),对其前锥角、后锥角及锥面曲度等不同结构参数的节流件构型进行数值模拟,以流出系数线性度、扩展不确定度及永久压力损失为性能评价指标,得到各几何参数对流量计性能影响趋势。仿真结果表明:相比于后锥角,前锥角对流出系数及永久压力损失的影响更大;固定的值在匹配特定前、后锥角时流量计可达到最佳性能;锥形节流件由直锥形改为圆弧形可大幅降低永久压力损失,增大后锥曲度可有效提升流出系数线性度。The electric fuel pump is a key component in the development of electrification for aviation engines.In order to accurately measure the fuel flow rate of the electric fuel pump and achieve precise control of the fuel flow rate for aviation engines,thereby effectively enhancing engine performance,the structural parameters of the V-cone flowmeter were selected and optimized for application in aviation engine environments,considering the wide range ratio requirements and narrow installation conditions inside the engine that cannot be satisfied by traditional flowmeters.Based on the desired pressure drop for a wide range of flow rates,a fixed equivalent diameter ratio β was chosen.Numerical simulation was performed to study the throttle element configurations with different structural parameters,including the front cone angle,back cone angle,and cone surface curvature.The performance evaluation criteria include the linearity of the discharge coefficient,expansion uncertainty,and permanent pressure loss.The influence trend of various geometric parameters on the performance of the flowmeter was obtained.The simulation results indicate that the front cone angle has a greater impact on the discharge coefficient and permanent pressure loss compared to the back cone angle.By selecting a fixed value that matches specific front and back cone angles,the flow meter can achieve optimal performance.Changing the conical throttle element from a straight cone shape to an arc shape can significantly reduce the permanent pressure loss,while increasing the curvature of the back cone can effectively improve the linearity of the discharge coefficient.

关 键 词：V锥流量计 计算流体力学 型面优化 流出系数 永久压力损失 电动燃油泵 

分 类 号：TH814[机械工程—仪器科学与技术]