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 | American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED |
| Publisher | Publ by ASME |
| Pages | 55-61 |
| Number of pages | 7 |
| Volume | 193 |
| ISBN (Print) | 0791813762 |
| Publication status | Published - 1994 |
| 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 |
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 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
Control of turbulent separating and reattaching flow by periodic perturbations. / Masuda, Shigeaki; Obi, Shinnosuke; Aoki, Kenta.
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED. Vol. 193 Publ by ASME, 1994. p. 55-61.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Control of turbulent separating and reattaching flow by periodic perturbations
AU - Masuda, Shigeaki
AU - Obi, Shinnosuke
AU - Aoki, Kenta
PY - 1994
Y1 - 1994
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0028018689&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028018689&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0028018689
SN - 0791813762
VL - 193
SP - 55
EP - 61
BT - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
PB - Publ by ASME
ER -