지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2014.10
- 수록면
- 449 - 452 (4page)
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초록· 키워드
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Control of flow over a circular cylinder based on three-dimensional momentum forcing is numerically investigated. In this study, the forcing is spatially varying in the direction of cylinder axis and thus it provides the flow with three-dimensional excitation. The present forcing can be realized by dielectric barrier discharge plasma actuators located at the cylinder surface. The main purpose of this study is to understand the effects of three-dimensional forcing on the flow structure and the drag and lift forces on the cylinder. Also, the effects of forcing wavelength and its optimal value for drag reduction are of present interest. The Reynolds numbers considered are 100 and 300, and the forcing wavelength is varied from 1D to 4D where D is the cylinder diameter. It is shown that the forcing results in the reduction of mean drag and lift fluctuation by changing flow structures significantly. The drag reduction is not caused by separation delay, implying that the present drag reduction comes from direct interaction with vortical structures in the wake.
목차
Abstract
1. Introduction
2. Numerical Methods & Results
3. Conclusions
4. References
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