摘要
针对由冲压涡轮和离心式加油泵共同组成的某型航空加油动力系统,在保持RAT不变的前提下,利用水力设计技术优化加油泵的性能,提高系统动力输出.采用CFD方法对原加油泵叶片进行优化设计,得到优化后的叶轮模型,并进行全流道三维数值模拟,经过反复迭代得到最终优化设计方案;根据优化设计结果生产试件,并进行试验验证.加油泵叶片优化前后的试验和模拟结果对比表明,经过理论设计—仿真计算—理论设计循环优化后的产品,其性能明显优于原型产品;通过内部流动分析发现,优化后的叶轮流道内横向旋涡尺度明显变小,旋涡强度减弱;优化后加油泵较原型泵模型效率增加8%,增压能力提高10%.研究结果增加了系统运行的可靠性,解决了系统匹配的问题,为航空燃油泵的优化设计提供了参考.
For a particular air refueling power system model which consists of RAT and a centrifugal fuel pump,on the premise of maintaining constant RAT,using the hydraulic design to optimize the performance of the refueling pump,thus the development needs of the system as a whole to improve the output power was satisfied.Firstly,using CFD method,the refueling pump was redesigned to optimize the performance.Full three-dimensional numerical simulation is applied to the optimized model.After repeatedly iterative optimization processes,the final optimized design was finally obtained.Secondly,based on optimization results,specimen products were made and tests were performed to verify the design.The comparison of test data and simulation results shows that,after cycling optimization procedure of theoretical design,numerical simulation and theoretical redesign,the optimized pump’s performance is superior to that of the original one.The analysis of the internal flow shows that the vortexes in the optimized flow domain are smaller and weaker.Compared with the original one,the optimized pump’s efficiency is increased by 8%,and the pumping pressure is raised by 10%.The results of this study can help enhance the reliability of system operation and solve the matching problem of the system and provide reference for optimal designing of other air-fuel pumps.
出处
《排灌机械工程学报》
EI
北大核心
2013年第6期471-474,共4页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金重点项目(51139007)
关键词
加油泵
离心泵
计算流体动力学
数值模拟
优化设计
refueling pump
centrifugal pump
computational fluid dynamics
numerical simulation
design optimization
