S弯喷管与飞机后机身一体化构型红外辐射特性研究  

Infrared radiation characteristics of serpentine nozzle integrated with aircraft rear fuselage configuration

作　　者：是介 周莉 史经纬[1] 王占学[1] SHI Jie;ZHOU Li;SHI Jingwei;WANG Zhanxue(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China;Collaborative Innovation Center for Advanced Aero-Engine,Beijing 100191,China)

机构地区：[1]西北工业大学动力与能源学院,陕西西安710129 [2]先进航空发动机协同创新中心,北京100191

出　　处：《推进技术》2024年第8期80-93,共14页Journal of Propulsion Technology

基　　金：国家自然科学基金(52076180);陕西省杰出青年科学基金项目(2021JC-10);国家科技重大专项(J2019-Ⅱ-0015-0036);航空发动机及燃气轮机基础科学中心项目(P2022-B-I-002-001,P2022-B-Ⅱ-010-001);中央高校基本科研业务费专项资金(501XTCX2023146001)。

摘　　要：为研究采用S弯喷管翼身融合飞行器的红外辐射特性,本文采用离散传递法计算了S弯喷管与翼身融合飞机后机身一体化构型的壁面、燃气和总红外辐射强度空间分布特征,实现了一体化构型不同部件的红外贡献度分解,获取了一体化构型的红外成像特征。结果表明:S弯喷管与飞机后机身一体化构型的红外辐射主要来自高温部件的壁面辐射,燃气辐射相对较小,总红外辐射分布特征和红外成像特征主要由壁面辐射决定;后机身部分影响了原有S弯喷管的红外辐射特性,总辐射峰值出现在了垂直探测面10°探测角,垂直探测面正负探测范围的积分非对称相对差值达到了56%;后甲板受到高温喷流加热成为一体化构型新的主要辐射源,与S弯喷管壁面共同贡献了95%以上的壁面红外辐射,其中垂直探测面上后甲板的红外贡献度达到了35.6%;红外图像中的高辐射亮度区集中在喷管喉道、喷管侧壁和后甲板;S弯喷管与后机身一体化构型的喷流出现了5°的矢量角,燃气辐射峰值出现在垂直探测面5°探测角处。To investigate the infrared radiation characteristics of the serpentine nozzle integrated with the rear fuselage of the wing-body fusion aircraft,this study used the discrete transfer method to calculate the wall,gas and total infrared radiation intensity distribution characteristics of the integrated configuration.The infrared contributions of different components of the integrated configuration were further decomposed.The infrared imag⁃es were also obtained.The results reveal that the dominant source of infrared radiation of the integrated configura⁃tion is the wall radiation from high-temperature components,while gas radiation plays a relatively minor role.The distribution characteristics of total infrared radiation and infrared imaging are primarily influenced by wall ra⁃diation.The rear fuselage affects the infrared characteristics of the original serpentine nozzle,with the total radia⁃tion peak observed at a 10°detection angle on the vertical detection plane.The integrated asymmetric relative dif⁃ference between the positive and negative ranges on vertical detection surface reached 56%.The aft deck heated by high-temperature gas becomes the important radiation source in the integrated configuration.Together with the serpentine nozzle wall,it contributes more than 95%of the wall infrared radiation.Notably,the aft deck alone ac⁃counting for 35.6%of the infrared contribution on the vertical detection plane.The high infrared radiance area in the infrared image are concentrated in the nozzle throat,nozzle side wall and aft deck.After the integrated design of serpentine nozzle and rear fuselage,the plume has a 5°vector angle,and the gas radiation peak appears at 5°detection angle on vertical detection plane.

关 键 词：S弯喷管 翼身融合 后机身一体化 红外辐射特性 红外成像 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]