서지주요정보
후향계단 난류 박리재부착 유동에서의 대형와의 구조 = Large-scale vortical structure in separated and reattaching flow over a turbulent backward-facing step
서명 / 저자 후향계단 난류 박리재부착 유동에서의 대형와의 구조 = Large-scale vortical structure in separated and reattaching flow over a turbulent backward-facing step / 안승광.
저자명 안승광 ; Ahn, Seung-Kwang
발행사항 [대전 : 한국과학기술원, 2002].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8012779

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 02036

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초록정보

An experimental study was made of a large-scale vortical structure in separated and reattaching flow over a turbulent backward-facing step. The Reynolds number based on the step height was $Re_H=33,000$. To recognize the large-scale vortex, three components of velocity were measured. The measurements were performed at the recirculation zone(x/H=4.0) and reattachment zone(x/H=7.5). To measure the wall pressure fluctuations over a turbulent backward-facing step, a 32-channel microphone array was installed below the wall in the streamwise and spanwise directions. From the measurements of the pressure field, the size of large-scale vortex was obtained. As a detailed study, a conditionally averaging technique was employed to characterize the coherent structure of the large-scale vortex. To see the relationship between the flow field and the relevant spatial mode of the pressure field, the spatial box filtering (SBF) was examined. A cross-correlation between velocity and pressure fluctuations was performed to identify the structure and the length scale of the large-scale vortex.

서지기타정보

서지기타정보
청구기호 {MME 02036
형태사항 v, 55 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Seung-Kwang Ahn
지도교수의 한글표기 : 성형진
지도교수의 영문표기 : Hyung-Jin Sung
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 54-55
주제 대형와
박리재부착
구조
vortical
structure
large-scale
backward-facing
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