空气动力学学报2019，Vol.37Issue(1)：99-106,8.DOI:10.7638/kqdlxxb-2018.0204
跨声速嗡鸣诱发机理及其失稳参数研究
Study on the mechansim and instability parameters of transonic buzz
摘要
Abstract
Transonic control surface buzz is an obstacle in the designing and using processes of modern aircraft,which can cause damages or serious deformation of the control surface.The limitation of previous investigations on transonic buzz is that they failed to predict the instability boundaries,which are key parameters to aircraft designers.In this paper,towards the typical buzz cases (A/B/C types),the inducing flow and structure conditions as well as the physical meaning of these parameters are studied by using the ROM-based aeroelastic analysis model and CFD/CSD time domain simulation method.Relevant results show that these buzzes are all the result of the instability on the structural branch owing to the coupling effect between the least-stable fluid mode and the structural mode.The eigenvalue analysis further reveals that the occurrence of transonic buzz requires the followings:(i)the stability margin of the flow is low enough (often near transonic buffet onset and offset conditions);(ii)the structural frequency is between those of zero-pole points of the open-loop Bode graph.This study helps to understand the physics and to propose new suppression methods for transonic buzz.关键词
嗡鸣/跨声速流动/诱发机理/流动模态/伯德图Key words
buzz/transonic flow/mechanism/fluid mode/Bode graph分类
数理科学引用本文复制引用
高传强,张伟伟..跨声速嗡鸣诱发机理及其失稳参数研究[J].空气动力学学报,2019,37(1):99-106,8.基金项目
国家自然科学基金项目(51720105005,51878504,51878503) （51720105005,51878504,51878503）
