轨控系统热喷干扰效应数值模拟  

Numerical study of hot jet interaction effect in divert control system

作　　者：傅杨奥骁 丁明松[1,2] 刘庆宗 江涛[1] 石润 董维中[1] 高铁锁[1] FU Yang’aoxiao;DING Mingsong;LIU Qingzong;JIANG Tao;SHI Run;DONG Weizhong;GAO Tiesuo(Computational Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China;State Key laboratory of Aerodynamics,China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[1]中国空气动力研究与发展中心计算空气动力研究所,绵阳621000 [2]中国空气动力研究与发展中心空气动力学国家重点实验室,绵阳621000

出　　处：《航空学报》2022年第9期350-365,共16页Acta Aeronautica et Astronautica Sinica

基　　金：基础加强计划重点基础研究项目(2019-JCJQ-ZD-047)。

摘　　要：喷流燃气的热喷干扰效应及其对飞行器气动力热特性的影响是目前喷流干扰研究中亟待解决的问题。针对高速飞行器轨控系统的热喷干扰效应,通过数值求解三维化学非平衡Navier-Stokes方程,分析了二次燃烧效应和异质气体喷射效应对飞行器气动力热特性的影响,研究了不同马赫数、飞行高度及飞行攻角条件下热喷干扰效应对飞行器气动力热特性的影响规律。研究表明:①热喷干扰效应对飞行器气动力热特性有较大影响,主要包括二次燃烧效应和异质气体喷射效应2种影响因素,在本文计算状态下,二次燃烧效应为主要影响因素;②在本文计算条件下,二次燃烧效应的影响主要表现为增加喷流干扰附加推力、增加附加抬头力矩以及使干扰区热流上升,马赫数越高、高度越低、喷口越迎风,二次燃烧效应的影响越大;③异质气体喷射效应的影响仅在高马赫数、喷口迎风的条件下较明显,但其影响幅度明显小于二次燃烧效应。Hot jet interaction effect and its influence on aerodynamic characteristics and aero-thermal environment of aircraft is an important issue remaining to be solved in research on jet interaction.By solving three-dimensional chemical non-equilibrium Navier-Stokes equations,this paper analyzes the influence of afterburning effect and heterogeneous gas injection effect in the high-speed aircraft divert control system on aerodynamic characteristics and aero-thermal environment of the aircraft.The hot jet interaction effect on the aircraft with different flight velocity,flight alttude and angle of attack is also analyzed.The result shows that hot jet interaction effect has pronounced influence on the aerodynamic characteristics and aero-thermal environment of aircraft,mainly including afterburning effect and heterogeneous gas injection effect.In this paper’s given conditions,hot jet interaction effect is dominated by afterburning effect,which can increase the thrust produced by jet interaction,produce an additional pitching up moment,and increase the heat flux in jet interference area.The higher the flight velocity,and the lower the flight altitude.The nozzle outlet on the windward side will enhance afterburning effect.Heterogeneous gas injection effect is enhanced when flight velocity is high and nozzle outlet is on windward side,but it is still insignificant compared with afterburning effect.

关 键 词：轨控系统 喷流干扰 二次燃烧效应 非平衡效应 气动力特性 气动热环境 

分 类 号：V211.4[航空宇航科学与技术—航空宇航推进理论与工程] V411.3