两侧进气的S弯进气道气动隐身特性研究  

Electromagnetic Scattering and Aerodynamic Characteristics of the Side-Mounted Inlet

作　　者：黄爱凤[1,2] 展凤江 盛思佳[3] HUANG Ai-feng;ZHAN Feng-jiang;SHENG Si-jia(Unmanned Aerial Vehicles Institute,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China;Key Laboratory of Advanced Technology for Small and Medium-sized UAV,Ministry of Industry and Information Technology,Nanjing Jiangsu 210016,China;Nanjing Military Representative Bureau of Army Equipment Department,Nanjing Jiangsu 210094,China)

机构地区：[1]南京航空航天大学无人机机研究院,江苏南京210016 [2]中小型无人机先进技术工信部重点实验室,江苏南京210016 [3]陆军装备部驻南京地区第一军事代室,江苏南京210094

出　　处：《计算机仿真》2024年第9期13-17,25,共6页Computer Simulation

基　　金：中央高校基本科研业务费资助(NJ2020010-01)。

摘　　要：基于多层快速多极子方法和有限体积法,建立了两侧进气S弯进气道的电磁散射和气动仿真模型,对其雷达散射截面(RCS)和气动特性进行了数值研究。对比分析了进口形状和偏距这两个主要几何参数对进气道RCS和总压恢复系数的影响规律。仿真结果表明,(1)等边三角形进口的进气道隐身性能较好,RCS随偏距减小;(2)梯形进口进气道的隐身性能对极化方向较为敏感,偏距以刚好遮挡发动机为宜;(3)进口形状对气动性能的影响大于偏距的影响,梯形进口进气道气动性能优于三角进口,但差别不大;(4)综合比较气动和隐身性能,等边三角形进口进气道最优,适当增加偏距可以以较小的气动损失大大提升隐身性能。Electromagnetic scattering and aerodynamic simulation models for the side-mounted S-shaped inlet were built respectively based on the multilevel fast multipole method(MFLMM) and finite volume method.The influence of two main geometric parameters,inlet shape and offset,on the inlet RCS and total pressure recovery coefficient was compared and analyzed.The results show that:The inlet with equilateral triangle intake exerts better stealth performance,and its RCS decreases with offset.The inlet with trapezoidal intake gets better stealth performance when the terminator is just covered by the smallest offset,and its RCS is sensitive to the direction of polarization.The Influence of intake shape on aerodynamic performance is greater than that of the offset.The inlet with trapezoidal intake exerts better aerodynamic performance than triangular inlet,and the difference is small.Considering both aerodynamic and stealth performance,the inlet with equilateral triangle intake is better.By increasing its offset,the stealth performance can be greatly improved with less aerodynamic loss.

关 键 词：两侧进气进气道 气动特性 雷达散射截面 影响因素 

分 类 号：V274.1[航空宇航科学与技术—飞行器设计]