Effects of Geometric Parameters on Performance of Rectangular Submerged Inlet for Aircraft  

矩形埋入式进气口结构参数对飞机性能的影响

作　　者：LIU Chao PEI Houju CHEN Changdong XU Wenbing YANG Kaijie 刘超;裴后举;陈常栋;徐文冰;杨凯杰(上海飞机设计研究院环控氧气部,上海201210,中国;中航工业南京伺服控制系统有限公司,南京210016;江苏科技大学能源与动力学院,镇江212003,中国;南京航空航天大学飞行器环境控制与生命保障工业和信息化部重点实验室,南京210016,中国)

机构地区：[1]Environment Control and Oxygen System Department,Shanghai Aircraft Design and Research Institute,Shanghai 201210,P.R.China [2]AVIC Nanjing Servo Control System Corporation,Nanjing 210016,P.R.China [3]College of Energy&Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,P.R.China [4]Key Laboratory of Aircraft Environment Control and Life Support,MIIT,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2021年第6期984-992,共9页南京航空航天大学学报（英文版）

基　　金：supported by the Open Project of Key Laboratory of Aircraft Environment Control and Life Support,MIIT(No.KLAECLS-E-202001)。

摘　　要：To improve the comfortability and safety of aircraft,the demand of rectangular submerged inlets(RSIs)with low resistance is proposed to increase the inlet flow rate of ram air. A theoretical model is built to numerically analyze the effects of geometric parameters on the inlet mass flow rate of RSIs. The geometric parameters in question here encompass the aspect ratio of 2—4,the ramp angle of 6°—7°,the characteristic parameter of the throat of 0.20 —0.30,the ramp length of 939—1 337 mm,and the cone angle of 0° —3°. Simulation results demonstrate that the mass flow rate(MFR)is positively correlated with the aspect ratio,ramp angle,ramp length,and cone angle,and negatively correlated with characteristic parameter of the throat. Within the range of the geometric parameters considered,the RSI with the aspect ratio of 3,the ramp angle of 6°,the characteristic parameter of the throat of 0.20,the ramp length of 1 337 mm,and the cone angle of 3° obtains the largest MFR value of about 2.251 kg/s.为了改善飞机的舒适性和安全性,提出一种低阻力的矩形埋入式进气口(Rectangular submerged inlets,RSIs)来提高冲压空气的进口流量,分析其主要结构参数并建立数值仿真模型。在此基础上,研究喉道宽高比(2~4)、斜坡倾角(6°~7°)、喉道特征比例(0.20~0.30)、开口长度(939~1 337 mm)和扩张角(0°~3°)这5个结构参数对矩形埋入式进气口质量流量(Mass flow rate,MFR)的影响情况。仿真结果表明:质量流量与喉道宽高比、斜坡倾角、开口长度和扩张角呈正相关,与喉道特征比例呈负相关。对于本研究,喉道宽高比为3、斜坡倾角α为6°、喉道特征比例为0.20、开口长度为1 337 mm,且扩张角为3°的进气口具有最大质量流量2.251 kg/s。

关 键 词：ram air system rectangular submerged inlet geometric parameter mass flow rate(MFR) 

分 类 号：V245.34[航空宇航科学与技术—飞行器设计]