서지주요정보
비정상 박리에 관한 실험적 연구 = An experimental study on unsteady separation
서명 / 저자 비정상 박리에 관한 실험적 연구 = An experimental study on unsteady separation / 안이기.
발행사항 [대전 : 한국과학기술원, 1995].
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등록번호

8005496

소장위치/청구기호

학술문화관(문화관) 보존서고

DAE 95004

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초록정보

The present study focuses on an experimental investigation of flows undergoing periodic unsteady separation. The experimental setup consists of a flat plate and an oscillating airfoil. The oscillating airfoil induces periodically the unsteady separation of the boundary layer over the flat plate. A split film sensor is used to measure the velocity field. Streamlines obtained from the measurement data at each phase angle of oscillation clearly demonstrate flow patterns signifying generation, growth, and convection of the separation bubble. A saddle point of the unsteady separation is identified. It is also found that the vortical structure of the separation bubble is convected downstream at a speed of 28% of average free stream velocity. In order to support the experimental finding, a numerical computaion of the same flow as in the experiment has been carried out by using a STAR-CD code. Computational results confirm the generation, growth, and convection of the separation vortex. It is also found that the saddle point, which is considered to be the separation point for the flow with upstream or downstream moving walls, exists in front of the separation vortex. Path lines are constructed from the computational results. Path lines clearly indicate the ejection of particles associated with the unsteady separation as can be observed in the experiment.

서지기타정보

서지기타정보
청구기호 {DAE 95004
형태사항 xii, 109 p. : 삽화 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Iee-Ki Ahn
지도교수의 한글표기 : 박승오
지도교수의 영문표기 : Seung-O Park
학위논문 학위논문(박사) - 한국과학기술원 : 항공우주공학과,
서지주기 참고문헌 : p. 93-99
주제 Vortex-motion.
Boundary layer.
Bubbles.
경계층 분리. --과학기술용어시소러스
기포. --과학기술용어시소러스
와류. --과학기술용어시소러스
에어포일. --과학기술용어시소러스
Aerofoils.
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