Numerical Simulations of Aerodynamic Instability of Bluff Body by the Discrete Vortex Method

1993 ◽  
pp. 885-892
Author(s):  
T. INAMURO
Keyword(s):  
Numerical Simulations ◽  
Bluff Body ◽  
Vortex Method ◽  
Discrete Vortex ◽  
Discrete Vortex Method ◽  
Aerodynamic Instability

Vortex-Induced Oscillations: A Selective Review

1979 ◽  
Vol 46 (2) ◽  
pp. 241-258 ◽  
Author(s):  
T. Sarpkaya
Keyword(s):  
Flow Field ◽  
Vortex Shedding ◽  
Bluff Body ◽  
Vortex Method ◽  
Added Mass ◽  
Research Topics ◽  
Discrete Vortex ◽  
Discrete Vortex Method ◽  
Wake Oscillator ◽  
Comprehensive Listing

This paper reviews the vortex-induced oscillations in a few specific fundamental cases. Research topics discussed are vortex shedding from a stationary bluff body; consequences of the synchronization phenomenon; wake-oscillator models; added mass, damping, and dynamic response measurements; flow-field models and the discrete-vortex method; mechanism of synchronization; and, finally, in-line oscillations. Because of the selective nature of the review, a fairly comprehensive listing of recent contributions to the literature on these and related aspects of flow-induced oscillations research is an essential part of the exposition.

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

scholarly journals Dynamic responses of anchored ducted flames to harmonic velocity forcing

2017 ◽  
Vol 10 (1) ◽  
pp. 72-85
Author(s):  
Ze-tian Ren ◽  
Su-hui Li ◽  
Min Zhu
Keyword(s):  
Large Scale ◽  
Bluff Body ◽  
Flow Instability ◽  
Low Frequency ◽  
Vortex Method ◽  
Vortex Structures ◽  
Dynamic Responses ◽  
Discrete Vortex ◽  
Flame Response ◽  
Complicated Geometries

This paper aims at developing a computationally inexpensive method to investigate the premixed flame instabilities. The kinematic G-equation is combined with a two-dimensional discrete vortex method, and the conformal mapping is applied to make calculations for complicated geometries more efficiently. The vortex dynamics and flame response to harmonic velocity forcing of an anchored ducted V-flame are investigated, and the effects of harmonic forcing, Reynolds number, and bluff body geometry are examined. Results show that the vortex structures, flow instability, and flame response are closely coupled with each other. The unsteady vortex structures generate instabilities at the flame base, and the convection of the flame wrinkles then influences the flame dynamics downstream. The flame heat release fluctuates with larger amplitude under low-frequency forcings, while the phase of the flame transfer function is quasi-linear with increasing forcing frequency. Both higher inflow velocity and sharper bluff body corners can result in more unsteady large-scale vortex structures and hence influence the flame responses.

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