XB-70飞行器折叠机翼总体性能分析  

Overall Performance Analysis on XB-70 Folding Wingtip System

作　　者：刘瑜 吕凡熹 周进 Liu Yu;Lyu Fanxi;Zhou Jin(Qian Xuesen Laboratory,China Academy of Space Technology,Beijing 100094,China;Chinese Aeronautical Establishment,Beijing 100012,China)

机构地区：[1]中国空间技术研究院钱学森空间技术实验室,北京100094 [2]中国航空研究院,北京100012

出　　处：《航空科学技术》2022年第12期47-53,共7页Aeronautical Science & Technology

摘　　要：针对跨速域飞行器在高速和低速状态下均要提升气动性能的难题,变体飞行器设计成为先进飞行器设计技术热点,而其中基于折叠机翼的变体飞行器设计成为可行的解决方案之一。本文概述了美国大型高空高速轰炸机XB-70飞行器的总体特点,详细介绍了其翼尖可折叠的变形机翼结构以及相关驱动和连接装置。构建了XB-70飞行器整机的三维外形,并进行了全机计算流体力学(CFD)分析网格的划分。通过典型工况下的CFD分析,获取了机翼折叠带来的升阻力特性变化特点,从总体性能角度分析了折叠机翼的变形策略,通过气动中心的变化进一步说明了XB-70机翼变形带来的总体性能优势。通过对折叠机翼构型的优势进行分析讨论,为变体飞行器设计提供参考。In this paper,the general characteristics of bomber aircraft XB-70 are summarized.The deformed wing structure with folding wingtip and related driving and connecting devices are introduced in detail.The model of XB-70aircraft is constructed,and the CFD analysis grid of the whole aircraft is divided.The aerodynamic characteristics of folding wingtip are simulated by CFD analysis of typical flying conditions.The folding wingtip deformation strategy is analyzed from the point of view of the overall performance,and the change of the pressure center confirms the advantage of overall performance brought by folding wingtip.The discussion about the superiority of folding wingtip configuration could provide reference for variant aircraft design.

关 键 词：XB-70 折叠机翼 升阻力 铰链力矩 变形策略 

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]