北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (5): 786-792.doi: 10.13700/j.bh.1001-5965.2014.0327

• 论文 • 上一篇    下一篇

飞翼布局无人机进排气影响及机理分析

郁新华, 陶于金, 张琳, 高丽敏   

  1. 西北工业大学 无人机研究所, 西安 710072
  • 收稿日期:2014-06-06 修回日期:2014-08-25 出版日期:2015-05-20 发布日期:2015-06-02
  • 通讯作者: 郁新华(1972—),男,江苏泰兴人,副教授,yuxinhua@nwpu.edu.cn,主要研究方向为无人机总体气动设计. E-mail:yuxinhua@nwpu.edu.cn
  • 基金资助:

    国家自然科学基金(51236006)

Influence of engine inlet and exhaust on flying wing UAV and its mechanism analysis

YU Xinhua, TAO Yujin, ZHANG Lin, GAO Limin   

  1. UAV Research Institute, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2014-06-06 Revised:2014-08-25 Online:2015-05-20 Published:2015-06-02

摘要:

进气道尾喷管的存在不仅影响着飞机机身前后的流场特性与压力分布,而且影响着飞机升力特性、阻力特性以及力矩特性.为了研究进排气效应对飞机气动特性的影响,采用计算流体力学(CFD)数值模拟技术,建立飞翼布局无人机(UAV)堵锥整流模型和动力影响模型,其中动力影响模型是根据发动机不同的工作状态,在进气道以及尾喷管截面上设置不同的边界条件,对比分析这两种计算模型在流场特征和气动特性上的差异性,揭示内在的影响机理.进排气效应的研究有助于飞机/发动机的一体化气动综合设计.

关键词: 飞翼布局无人机, 进气道尾喷管, 计算流体力学, 气动特性, 机理分析

Abstract:

The inlet and exhaust can remarkably affect the pressure distribution and flow fields properties near the forebody and afterbody of the aircraft, therefore causing certain changes to the lift, drag and momentum characteristics. In order to know how inlet and exhaust affect aerodynamic characteristics of aircraft, computational fluid dynamics (CFD) numerical simulation technology was introduced to build a flying wing unmanned aerial vehicle (UAV) fairing model and an actual model, in which engine inlet and exhaust were taken into account. Boundary conditions of the actual model at the inlet and exhaust cross sections were set according to the different engine working conditions. Comparative analysis shows differences of flow fields and aerodynamic characteristics between these two models and reveals inner effect mechanism of the differences. The study on exhaust effect benefits the comprehensive aerodynamic design of aircraft/engine integrated system.

Key words: flying wing UAV, inlet and exhaust, computational fluid dynamics (CFD), aerodynamic characteristics, mechanism analysis

中图分类号: 


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