Numerical investigation of the mechanism of asymmetric vortex flows

1990 ◽  
Vol 6 (4) ◽  
pp. 311-315
Author(s):  
Zhang Wu ◽  
Luo Shijun
Keyword(s):  
Numerical Investigation ◽  
Vortex Flows ◽  
Asymmetric Vortex

NUMERICAL STUDIES OF ASYMMETRIC VORTEX FLOWS AROUND A SLENDER BODY AT HIGH ANGLE OF ATTACK

2005 ◽  
Vol 19 (28n29) ◽  
pp. 1463-1466
Author(s):  
TONGQING GUO ◽  
ZHILIANG LU
Keyword(s):  
Stokes Equations ◽  
Angle Of Attack ◽  
Navier Stokes ◽  
Finite Volume Scheme ◽  
Vortex Flows ◽  
High Angle ◽  
High Angle Of Attack ◽  
Asymmetric Vortex ◽  
Vortex Pattern ◽  
Asymmetric Shape

The asymmetric vortex flows about slender bodies at high angle of attack are investigated numerically. 3D O-O type multi-block structured grids are adopted for the computation, and a series of small spatial disturbances are imposed on the leeward body surface near the tip to trigger the asymmetry. The unsteady Navier-Stokes equations are solved using a dual-time method based on the cell-centered finite-volume scheme. Comparisons between numerical results and experimental data demonstrate that the asymmetric vortex pattern observed in the experiment is successfully simulated. In a certain small perturbation level, the magnitude of the side-force is independent of the size of the spatial perturbation, but its direction is dependent on the direction of the spatial perturbation, i.e. a counterclockwise or clockwise circumferential angle from the leeward meridian. When perturbation is removed, the flow field returns to its original asymmetric shape after a period of oscillation.

Numerical Investigation of Discharge Current Path in a Hydrogen MPD Thruster

2016 ◽  
Vol 136 (3) ◽  
pp. 141-146 ◽  
Author(s):  
Akira Kawasaki ◽  
Kenichi Kubota ◽  
Ikkoh Funaki ◽  
Yoshihiro Okuno
Keyword(s):  
Numerical Investigation ◽  
Discharge Current ◽  
Current Path
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