한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
권호 표지

초음속 고받음각에서의 원뿔형 물체 주위의 비대칭 와류 특성 연구

ASYMMETRIC VORTEX CHARACTERISTICS AT A CONE UNDER SUPERSONIC HIGH ANGLE OF ATTACK FLOW

  • 박미영 (건국대학교 대학원 항공우주정보시스템공학과) ;
  • 노경호 (건국대학교 대학원 항공우주정보시스템공학과) ;
  • 박수형 (건국대학교 항공우주정보시스템공학과) ;
  • 이재우 (건국대학교 항공우주정보시스템공학과) ;
  • 변영환 (건국대학교 항공우주정보시스템공학과)
  • 발행 : 2008.06.30
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초록

A supersonic viscous flow over a five-degree half-angle cone is studied computationally with three-dimensional Navier-Stokes equations. Steady asymmetric solutions show that the asymmetric flow separation is caused by convective instability. The effects of angle of attacks, Reynolds numbers, and Mach numbers have been investigated and it is found that those factors affect the generation of the side force. The side force has the maximum value at ${\alpha}=22^{\circ}$, while over ${\alpha}=22^{\circ}$, asymmetric vortex becomes transient, which results in the unsteady shedding. At the angle of attack of 22 degrees, the side force increases with Reynolds number and decreases with Mach number. The increase of the side force stops over the critical Reynolds number for the present configuration.

키워드

참고문헌

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