辅助动力舱冷却用排气引射器性能快速评估方法  

Rapid Evaluation Method for Pumping Performance of Exhaust Ejector Used in APU Compartment Cooling

作　　者：高鹏 王代军 周红 马双超 Gao Peng;Wang Daijun;Zhou Hong;Ma Shuangchao(AVIC The First Aircraft Institute,Xi’an 710089,China)

机构地区：[1]航空工业第一飞机设计研究院,陕西西安710089

出　　处：《航空科学技术》2023年第6期48-53,共6页Aeronautical Science & Technology

摘　　要：在飞机辅助动力装置系统研制过程中,只能通过试验和计算流体力学(CFD)仿真方法对排气引射器的引射性能进行评估,且评估效率低、研制成本高,故无法获得任意工况下排气引射器的引射性能。本文提出用速度系数比β参数来描述排气引射器的引射性能,并建立了辅助动力舱冷却用排气引射器性能快速评估方法,通过CFD仿真分析对该方法的合理性和准确性进行了验证,验证结果表明,该方法可以快速、准确地评估各种地面工况下排气引射器的主流出口静压和总压、次流流量、次流出口总压等参数,且计算精度保持在2.382%以内,满足工程使用要求,大大提高了评估效率,具有较高工程应用价值。In the process of aircraft auxiliary power unit system design and development,only test method and CFD method could be used for getting the pumping performance of exhaust ejector,which needs mass time and costs.therefore,the pumping performance of exhaust ejector in all kinds of APU working conditions on the ground can not be getted.In this paper,the velocity coefficient ratioβis presented,and a rapid evaluation method for pumping performance of exhaust ejector used in APU compartment cooling is established.By comparing with CFD results,the contrastive result demonstrate that this method is correct and accurate.This method can evaluate pumping performance rapidly when APU works at all kinds of working conditions on the ground,such as the static pressure and total pressure of primary flow outlet,the secondary mass flow,and the total pressure of secondary flow outlet.This method can maintain evaluation accuracy within 2.382%to meet the engineering design requirements and improve evaluation efficiency greatly.It is significant for engineering applications.

关 键 词：辅助动力装置 排气引射器 速度系数 总压损失 引射性能 

分 类 号：V228.7[航空宇航科学与技术—飞行器设计]