한국전산유체공학회:학술대회논문집
- 2008.03b
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- Pages.33-38
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- 2008
Asymmetric Vortices around a Body at High Angle of Attack Subsonic Flow
아음속 유동하의 고 받음각 물체 주위의 비대칭 와류 특성 연구
Abstract
Numerical investigation of asymmetric vortices at high angles of attack subsonic flow is performed using three-dimensional Navier-Stokes equations. A small bump has been carefully selected and attached near the nose of an ogive cylinder to simulate symmetric vortices. Selected bump shape does develop asymmetric vortices and is verified using Lamont's experimental results. By changing the angle of attack, Reynolds numbers, and Mach numbers, the characteristics of asymmetric vortices are observed. The angle of attack which contributes significantly to the generation of asymmetric vortices are over 30 degrees. By increasing Mach number and Reynolds number asymmetric vortices, hence the side forces show decreasing trend..
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