Control and Identification of Vortex Wakes1

1998 ◽  
Vol 122 (2) ◽  
pp. 298-305 ◽  
Author(s):  
C. R. Anderson ◽  
Y.-C. Chen ◽  
J. S. Gibson
Keyword(s):  
Feedback Control ◽  
Flat Plate ◽  
Vortex Method ◽  
Pi Controller ◽  
Flow Dynamics ◽  
Input Output ◽  
Discrete Vortex ◽  
Identification Methods ◽  
Discrete Vortex Method

In this paper, control and identification methods for vortex wakes are investigated. The particular problem studied concerns the stabilization of vortices behind a flat plate, using backside suction as an actuator. The flow dynamics are modeled with a discrete vortex method. Feedback control results for a linear PI controller are presented as well as identification results for a class of input/output models that can be used to design more sophisticated controllers. [S0022-0434(00)00502-5]

A Numerical Solution for Potential Flows Including the Effects of Vortex Shedding

1993 ◽  
Vol 115 (2) ◽  
pp. 111-115
Author(s):  
L. H. Wong ◽  
S. M. Calisal
Keyword(s):  
Flat Plate ◽  
Boundary Element ◽  
Vortex Shedding ◽  
Potential Flow ◽  
Vortex Method ◽  
Vortex Sheet ◽  
Oscillating Flow ◽  
Discrete Vortex ◽  
Discrete Vortex Method ◽  
Inner Region

This paper reports on an attempt to include vortex shedding effects into potential flow calculations using the boundary element method. Significant computational advantages result because of the relatively simple approach to handling separation at the sharp edges while working only with the boundary values. A discrete vortex method was incorporated into a time domain boundary element algorithm for the numerical simulation of oscillating flow past a normal flat plate. Separation from a sharp edge results in the formation of a vortex sheet issuing from the edge. This vortex sheet is modeled by a series of discrete vortices introduced one at a time into the flow field at regular intervals. The motion of each vortex is traced over time using its convection velocity. As long as the Keulegan-Carpenter number is small enough, vortex shedding takes place close to the edge. The discrete vortex method can, in such cases, be looked upon as the inner region solution to the problem of normal oscillating flow past the flat plate. This inner region solution has to be matched with the outer potential flow solution. The combination of boundary element and discrete vortex methods provides this matching and at the same time does not require calculations inside the domain.

Flows past a rotating circular cylinder by the discrete vortex method.

1989 ◽  
Vol 9 (34) ◽  
pp. 273-276
Author(s):  
Takeyoshi Kimura ◽  
Michihisa Tsutahara ◽  
Zhong-yi Wang ◽  
Hiroshi Ishii
Keyword(s):  
Circular Cylinder ◽  
Vortex Method ◽  
Discrete Vortex ◽  
Discrete Vortex Method ◽  
Rotating Circular Cylinder

Discrete Vortex Method-Based Model for Ground-Effect Studies

AIAA Journal ◽  
2014 ◽  
Vol 52 (12) ◽  
pp. 2817-2828 ◽  
Author(s):  
Partha Mondal ◽  
N. Balakrishnan
Keyword(s):  
Ground Effect ◽  
Vortex Method ◽  
Discrete Vortex ◽  
Discrete Vortex Method
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