空气动力学学报Issue(3)：369-375,7.DOI:10.7638/kqdlxxb-2012.0126
跨超声速开式空腔流激振荡模态预估分析
Prediction and analysis of flow oscillation modes inside open cavities at transonic or supersonic speeds
摘要
Abstract
Unsteady flow characteristics and complex flow-field structures are main phenemena as tran-sonic or supersonic speed flow past open cavities.Physical mechanism and rational predicted method of flow-oscillations in open cavities remains as a research hotspot for years.Many explanations on the flow-oscilla-tion in the open cavities are proposed now and then.The method presented by Rossiter is the most feasible, which indicates a theory model for sound occurrence and feed-back in the open cavities.The method recuenes that some vortices are generated from flow separation in shear-layer over the open cavity,then the vortices move to the rear region of the cavity at some velocity,and impingement of the vortex and the rear-wall of the cavity occurs.Some sound waves spread abroad to the cavity fore-wall,which induces some new vortices generation,and the vortices shed,move and impinge on the cavity rear-wall.New sound waves occur. Therefore,this paper presents some analysis of the parameters describing flow-oscillations based on non-di-mension analysis method according to predicted method on self-sustained flow-oscillation modes in open cavi-ties.A new selected method on the constant value in Rossiter′s and Heller′s semi-experience formula is pres-ented.The result indicates that the method is feasible by comparing with wind-tunnel experimental result and overseas references.关键词
开式空腔/流激振荡/模态预估/物理机制/预估方法Key words
open cavities/flow oscillation/predicted modes/physical mechanism/predicted method分类
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杨党国,祝静,李建强,梁锦敏,张诣..跨超声速开式空腔流激振荡模态预估分析[J].空气动力学学报,2014,(3):369-375,7.基金项目
国家自然科学基金（11272335）；气动预研基金 （）
