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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2002.12
- 수록면
- 1,674 - 1,680 (7page)
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초록· 키워드
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An experimental study was made of a large-scale vortical structure over a 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 in the recirculation zone (x/H=4.0) and the reattachment zone(x/H=7.5). To measure the wall pressure fluctuations in a turbulent flow over a backward-facing step, a 32-channel microphone array was installed beneath the wall in the streamwise and spanwise directions. From the measured 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.
목차
Abstract
1.서론
2.실험장치와 실험방법
3.실험 결과 및 토의
4.결론
후기
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