| タイトル | A self-contained, automated methodology for optimal flow control validated for transition delay |
| 本文（外部サイト） | http://hdl.handle.net/2060/19960008032 |
| 著者（英） | Gunzburger, Max D.; Joslin, Ronald D.; Erlebacher, Gordon; Nicolaides, R. A.; Hussaini, M. Yousuff |
| 著者所属（英） | Institute for Computer Applications in Science and Engineering |
| 発行日 | 1995-09-01 |
| 言語 | eng |
| 内容記述 | This paper describes a self-contained, automated methodology for flow control along with a validation of the methodology for the problem of boundary layer instability suppression. The objective of control is to match the stress vector along a portion of the boundary to a given vector; instability suppression is achieved by choosing the given vector to be that of a steady base flow, e.g., Blasius boundary layer. Control is effected through the injection or suction of fluid through a single orifice on the boundary. The present approach couples the time-dependent Navier-Stokes system with an adjoint Navier-Stokes system and optimality conditions from which optimal states, i.e., unsteady flow fields, and control, e.g., actuators, may be determined. The results demonstrate that instability suppression can be achieved without any a priori knowledge of the disturbance, which is significant because other control techniques have required some knowledge of the flow unsteadiness such as frequencies, instability type, etc. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 96N15198
NASA-CR-198215
NAS 1.26:198215
ICASE-95-64
NIPS-95-06129 |
| 権利 | No Copyright |
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