空气动力学学报2024，Vol.42Issue(5)：45-52,8.DOI:10.7638/kqdlxxb-2023.0063
一种仿生蜻蜓式垂直起降喷管的流动特性分析及优化设计
Flow characteristic analysis and optimization design of a bionic dragonfly vertical takeoff and landing nozzle
赵海宇 1宋经远 2胡双卫 1钟锐 1王青山1
作者信息
- 1. 中南大学机电工程学院,长沙 410083
- 2. 中国航发沈阳发动机研究所,沈阳 110015
- 折叠
摘要
Abstract
In order to improve the stealth performance and maneuverability of the aircraft exhaust system,this paper proposes a bionic dragonfly vertical takeoff and landing nozzle,whose flow characteristics and optimization under different modes are investigated.The Computational Fluid Dynamics approach is used to simulate the flow fields of this nozzle in the cruise,S-type stealth,and vertical takeoff and landing modes.Based on the analyses of the obtained flow fields in each mode,the effects of the relative angle between adjacent nozzle sections on the nozzles's aerodynamic characteristics in the S-type stealth mode and the vertical takeoff and landing mode were studied,yielding an optimized combination of the relative angles for each mode.The results show that,under the same condition,the conventional cruise-mode nozzle has a better aerodynamic performance;the relative angle of adjacent nozzle sections significantly impacts on the aerodynamic performance of the nozzle.The overall aerodynamic performance of the S-type stealth mode nozzle with an angle combination θ1=-34°,θ2=12°and θ3=22°and the vertical takeoff and landing mode nozzle with θ1=35°,θ2=30°and θ3=30°are better.关键词
排气系统/垂直起降喷管/CFD方法/气动性能/流道优化Key words
exhaust system/vertical takeoff and landing nozzle/CFD method/aerodynamic performance/flow channel optimization分类
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赵海宇,宋经远,胡双卫,钟锐,王青山..一种仿生蜻蜓式垂直起降喷管的流动特性分析及优化设计[J].空气动力学学报,2024,42(5):45-52,8.
