鸭式布局大迎角大振幅俯仰动态气动特性机理研究进展
Investigation on the Dynamic Aerodynamic Characteristics Mechanism of Canard Configurations Pitching at High Angle of Attack with Large Amplitude
刘沛清 1唐文烜 1胡天翔1
作者信息
- 1. 北京航空航天大学 陆士嘉实验室,北京 100191
- 折叠
摘要
鸭式布局战斗机在大迎角大振幅俯仰机动过程中,由于动态洗流与非定常涡系干扰之间的耦合机理极为复杂,流动非定常性和非线性干扰的机理尚不明确,难以有效地对流场进行控制,这限制了鸭式布局过失速机动性能.基于静态研究中前缘涡演化规律,本文总结了三角翼和鸭式布局在动态俯仰过程中的非定常气动特性和涡系演化机理,分析了鸭翼参数对鸭式布局动态俯仰中气动特性的影响,尤其关注到俯仰缩减频率的重要作用.重点开展鸭式布局在一系列缩减频率下动态俯仰非定常气动特性的研究,着重分析了高缩减频率下鸭式布局有效迎角对动态升力迟滞环和空间涡系演化轨迹的影响,划分了受涡系演化主导的慢反应区间和受动态洗流主导的快反应区间.
Abstract
During the pitching progress of canard configuration,unsteady interaction between canard vortex and wing vortex occurs due to the wash flow produced by the pitching movement,which makes it difficult to launch the effective flow control and limits the post-stall maneverability of the canard configuration.Based on the evolution of the leading-edge vortex in the steady state,this paper summarized the unsteady aerodynamic characteristic and the evolution of the vortex system for the delta wing and canard configuration,and analyzes the effect of the canard parameters,especially the reduced frequency.It emphasises the research of unsteady aerodynamic characteristics of the dynamic-pitching canard configuration under a series of reduced frequencies,and analyzes the effect of the effective angle of attack on the characteristic of the dynamic lift hysteresis loop and the evolution track of the vortices.Furthermore,the pitching motion of the canard configuration under several reduced frequencies were divided into the slow reaction effect zone which was dominated by the evolution of vortex system,and the fast reaction effect zone which is dominated by dynamic washing flow and the transition zone.
关键词
鸭式布局/缩减频率/动态洗流/气动特性/涡系演化Key words
canard configuration/reduced frequency/dynamic washing flow/aerodynamic characteristic/vortex evolution引用本文复制引用
出版年
2024
NETL
NSTL
万方数据