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A Numerical Study of the Response of the Laminar Unsteady Separated Flow about a Circular Cylinder to Changes of Boundary Conditions

Sun, Yi-Chun and Shen, Shanfu and Chen, Nanqian (1990) A Numerical Study of the Response of the Laminar Unsteady Separated Flow about a Circular Cylinder to Changes of Boundary Conditions. DLR-Forschungsbericht. 90-10, 112 S.

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Abstract

An extensive investigation of the effective possibilities of controlling the laminar unsteady separated flow about a circular cylinder is made by way of the numerical simulation on the basis of the unsteady Navier-Stokes equations. The objectives of flow control are aimed at the reduction of flow resistance and the alleviation of the fluctuating normal force. According to the present inestigations, it is apparent that in the application of the control measures attention should be paid to the different aspects of their consequences. A control measure that reduces the flow resistance may however aggravate the fluctuation of normal forces and vice versa. The optimal control can be achieved through local tangential wall motion with velocities of a fictitious potential flow.

Document Type:Monograph (DLR-Forschungsbericht)
Additional Information: LIDO-Berichtsjahr=1990,
Title:A Numerical Study of the Response of the Laminar Unsteady Separated Flow about a Circular Cylinder to Changes of Boundary Conditions
Authors:
AuthorsInstitution or Email of Authors
Sun, Yi-ChunUNSPECIFIED
Shen, ShanfuCornell University, Ithaca
Chen, NanqianBeijing University of Aeronautics and Astron., Beijing
Date:1990
Number of Pages:112
Status:Published
Keywords:Wake, Flow Resistance, Wall-Bleeding, Wall Suction, Wall Motion, Flow Separation, Vortex Shedding
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Theoretische Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:34

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