Transition control by periodic suction-blowingThe applicability of active control of transition by period suction-blowing is investigated via direct numerical simulations of the Navier-Stokes equations. The time-evolution of finite-amplitude disturbances in plane channel flow is compared in detail with and without control. The analysis indicates that for relatively small three-dimensional amplitudes, a two-dimensional control effectively reduces disturbance growth rates even for linearly unstable Reynolds numbers. After the flow goes through secondary instability, three-dimensional control seems necessary to stabilize the flow. An investigation of the temperature field suggests that passive temperature contamination is operative to reflect the vorticity dynamics during transition.
Document ID
19850059260
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Biringen, S. (New Hampshire Univ. Durham, NH, United States)
Nutt, W. E. (New Hampshire Univ. Durham, NH, United States)
Caruso, M. J. (New Hampshire, University Durham, United States)