某型涡扇发动机试车台引射系数研究分析  

Research and Analysis on Ejecting Coefficient of a Turbofan Engine in the Test Bench

作　　者：何敏祥 龙振军 朱爱迪 邓少春 宋瑞民 文强 HE Min-xiang;LONG Zhen-jun;ZHU Ai-di;DENG Shao-chun;SONG Rui-min;WEN Qiang(AECC,Guiyang Engine Design Research Institute,Guiyang 550081,China)

机构地区：[1]中国航发贵阳发动机设计研究所,贵阳550081

出　　处：《内燃机与配件》2021年第15期60-62,共3页Internal Combustion Engine & Parts

摘　　要：基于某型涡喷发动机试车时的台架气动参数,校验计算结果与试验得到的参数最大相差约5.1%。通过理论计算分析某型涡扇发动机试车时引射系数及排气筒内流场情况,估算出某型涡扇发动机在某试车台试车时引射系数为9.21,试车台空气流速为4.23m/s,引射筒出口静压为88.64kPa,引射筒出口气体流速为65.26m/s,引射气体可以从排气塔排出;计算出无因次参数H=0.346<0.6,引射筒内会有环流区出现,对于该型涡扇发动机和其它型号发动机排气引射系统的研制具有一定的工程应用价值。Based on the aerodynamic parameters of a type of turbojet engine during test run.The parameters were obtained by calculation and test respectively,their maximum difference is about 5.1%.When a certain type of turbofan engine is tested in the test bench,it was estimated that the ejection coefficient is 9.21,the airflow velocity at the test bench was 4.23m/s,the static pressure at the outlet of Ejector cylinder is 88.64kPa,the airflow velocity at the outlet of ejector cylinder is 65.26m/s,the ejection gas can be discharged from the exhaust tower.By calculating the dimensionless parameter is 0.346,less than 0.6,this means that the circulation zone appears in the ejector cylinder.The research on the exhaust ejection coefficient of this type of turbofan engine and other types of engine has certain engineering application value.

关 键 词：航空发动机 试车台 引射系数 排气系统 

分 类 号：V263.6[航空宇航科学与技术—航空宇航制造工程]