高速飞行器级间分离流场红外辐射特性数值模拟  

Numerical simulation of infrared radiation characteristics of highspeed aircraft’s stage separation flow field

作　　者：傅杨奥骁 丁明松[1] 刘庆宗 李鹏[1] 董维中[1] 高铁锁[1] 江涛[1] FU Yang’aoxiao;DING Mingsong;LIU Qingzong;LI Peng;DONG Weizhong;GAO Tiesuo;JIANG Tao(Computational Aerodynamics Institute,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,四川绵阳621000

出　　处：《红外与激光工程》2025年第3期154-163,共10页Infrared and Laser Engineering

基　　金：国家数值风洞工程项目;国家重点研发计划项目(2019YFA0405203)。

摘　　要：针对高速飞行器级间反喷分离对飞行器目标红外辐射特性的影响问题,基于谱带辐射模型,通过求解带化学反应源项的三维Navier-Stokes方程和辐射传输方程,对飞行器级间反喷分离流场及其红外辐射特性进行了数值模拟,分析了流场及飞行器壁面的红外辐射特性,研究了喷流燃气组分化学反应对飞行器目标红外特性的影响,获得了不同观测角度和波段下目标的红外辐射特性。研究表明:在文中的条件下,高速飞行器进行级间反喷分离时,流场与飞行器壁面红外辐射强度基本处于一个量级,流场的红外辐射主要由H_(2)O和CO_(2)组分贡献;飞行器进行级间反喷分离时,由喷流高温燃气引起的辐射增量十分显著,最大可使飞行器目标辐射强度增大数倍,在相同观测角度下,1~3μm波段的辐射强度最大;由于飞行速度很快,流场中的喷流燃气组分主要发生离解反应,考虑喷流燃气组分的化学反应后,流场红外辐射强度明显降低,最大可降低50%以上,这与低空状态下喷流燃气组分复燃反应导致辐射强度增大的现象不同。该研究结果可为飞行器探测识别提供参考。Objective When high-speed tandem layout vehicle reaches predetermined separation point,payloads needs to separate from the booster,in order to separate successfully,it is feasible to apply jet thruster on the booster to provide reverse thrust,thus makes the booster separate safely from the payloads.During this stage separation,high-temperature gas ejected from jet thruster not only generates strong infrared radiation,but also affect the temperature distribution on vehicle’s surface,which ultimately affects the radiation characteristics of the target.Meanwhile,due to the high flight speed,inflow air and jet gas in flow field will be involved in complex chemical reactions such as dissociation,ionization and afterburning,which can also significantly affect the radiation characteristics of the target.In the field of aircraft detecting and tracking,most researches focuses on aircraft’s steady state infrared radiation characteristics,while the transient radiation characteristic during the stage separation is a typical characteristic different from those steady state characteristics,investigation on this transient radiation characteristic can provide useful reference for aircraft detecting and tracking application.This paper investigates the influence of high-speed aircraft’s stage separation on target infrared radiation characteristics,the infrared radiation characteristics of flow field and aircraft’s surface is analyzed,the influence of jet gas’s chemical reaction,observation wave bands and observation angles on radiation characteristics is also studied.Methods Typical lifting body payload with booster is used as research object(Fig.3),three-dimensional Navier-Stokes equation with chemical reaction source term is solved to simulate the high-speed aircraft’s stage separation flow field,the chemical reactions of jet gas and inflow air is considered.By using radiative equilibrium wall condition,vehicle’s surface temperature is calculated.The radiative transfer equations are solved based on statistical narr

关 键 词：高速飞行器 级间分离 喷流干扰 化学反应 红外辐射 数值模拟 

分 类 号：V211.751[航空宇航科学与技术—航空宇航推进理论与工程]