考虑涂敷的翼型气动高频电磁隐身一体化设计  

Integrated aerodynamic and high frequency electromagnetic stealth design of airfoil considering coating

作　　者：李思桐 夏露[1,3] 周琳 赵轲 LI Sitong;XIA Lu;ZHOU Lin;ZHAO Ke(School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China;China Aerodynamics Research and Development Center,Mianyang 621000,China;National Key Laboratory of Aircraft Configuration Design,Xi’an 710072,China)

机构地区：[1]西北工业大学航空学院,西安710072 [2]中国空气动力研究与发展中心,绵阳621000 [3]飞行器基础布局全国重点实验室,西安710072

出　　处：《航空学报》2024年第17期244-258,共15页Acta Aeronautica et Astronautica Sinica

基　　金：国家重点研发计划(2023YFB3002800)。

摘　　要：隐身涂敷设计是先进作战飞机隐身性能的关键技术和必要措施,传统的涂敷设计主要依赖工程经验,缺乏对涂敷设计系统性研究,导致隐身涂敷设计与飞行器气动特性之间关系不明确,难以实现飞行器气动、隐身、重量和使用维护等一体化最优。针对以上问题,本文首先以对称翼型NACA65013为研究对象,对比分析了涂敷厚度和位置对其气动、隐身和重量特性的影响,发现涂敷位置和厚度对翼型气动、隐身特性和重量影响很大,并且三者存在明显的矛盾关系。在此基础上,综合气动、隐身和重量设计要求,选取了最优的涂敷区域,进而开展了考虑涂敷影响的翼型气动隐身优化设计研究,并与不考虑涂敷的翼型外形气动隐身优化设计结果进行对比。结果表明,考虑涂敷的气动隐身设计结果其前向RCS均值比不考虑涂敷的翼型外形气动隐身优化设计结果下降了1个数量级,比初始翼型前向RCS均值下降了90%以上。本文研究工作为飞机气动隐身外形精细化设计和涂敷材料精细化设计提供了高效可靠的设计方法,具有较大的理论和工程价值。Stealth coating design is the key technology and necessary measure for stealth performance of advanced combat aircraft.The traditional coating design mainly depends on engineering experience,and lacks systematic re⁃search on coating design,leading to the unclear relationship between stealth coating design and aerodynamic charac⁃teristics of aircraft.Thus,it is difficult to achieve integrated optimization of aircraft aerodynamics,stealth,weight,use and maintenance.To solve the above problems,this paper takes the symmetrical airfoil NACA65013 as the research object,and comparatively analyzes the effects of coating thickness and position on its aerodynamic,stealth and weight characteristics.It is found that the coating position and thickness significantly influence the aerodynamic,stealth and weight characteristics of the airfoil,with obvious contradictions among them.Then,according to the re⁃quirements of the aerodynamic,stealth and weight design,the optimal coating area is selected,the aerodynamic stealth optimization design of the airfoil considering the influence of coating is conducted and compared with that of air⁃foil shape without coating.The results show that the forward Radar Cross-Section(RCS)of the aerodynamic stealth design results considering coating is one order of magnitude lower than that of the airfoil shape without coating,and more than 90%lower than that of the initial airfoil.This research provides an efficient and reliable design method for the fine design of aircraft aerodynamic stealth shape and coating material,exhibiting high theoretical and engineering value.

关 键 词：气动隐身优化 矩量法 阻抗边界条件 雷达吸波材料涂敷 飞翼布局翼型 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]