Abstract
The effect of periodic perturbation on turbulent separation from a smooth surface of an asymmetric plane-walled diffuser has been experimentally investigated. The perturbation is applied through a spanwise slit on the diffuser wall located upstream of the detachment point. The promotion of the flow reattachment is found remarkable within an optimum frequency range of the perturbation, while the flow detachment point remains unaffected. The momentum transport due to the organized velocity oscillation is explored on the basis of three-level decomposition. It is found that the production of turbulent stress is enhanced by the periodic perturbation in the separated shear layer, that occurs uniquely at the optimum frequency.
| Original language | English |
|---|---|
| Title of host publication | Turbulence Control |
| Publisher | Publ by ASME |
| Pages | 55-61 |
| Number of pages | 7 |
| ISBN (Print) | 0791813762 |
| Publication status | Published - 1994 Jan 1 |
| Event | Proceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18) - Lake Tahoe, NV, USA Duration: 1994 Jun 19 → 1994 Jun 23 |
Publication series
| Name | American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED |
|---|---|
| Volume | 193 |
Other
| Other | Proceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18) |
|---|---|
| City | Lake Tahoe, NV, USA |
| Period | 94/6/19 → 94/6/23 |
ASJC Scopus subject areas
- Engineering(all)
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Cite this
Masuda, S., Obi, S., & Aoki, K. (1994). Control of turbulent separating and reattaching flow by periodic perturbations. In Turbulence Control (pp. 55-61). (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED; Vol. 193). Publ by ASME.