scholarly journals Detached Eddy-Simulation of Delta-Wing Post-Stall Flow Control

2018 ◽  
Vol 29 ◽  
pp. 46-57 ◽  
Author(s):  
Andrei Buzica ◽  
Manuel Biswanger ◽  
Christian Breitsamter
Keyword(s):  
Flow Control ◽  
Delta Wing ◽  
Detached Eddy Simulation ◽  
Eddy Simulation

Analysis of Delta-Wing Vortical Substructures Using Detached-Eddy Simulation

AIAA Journal ◽  
10.2514/1.755 ◽  
2006 ◽  
Vol 44 (5) ◽  
pp. 964-972 ◽  
Author(s):  
Anthony M. Mitchell ◽  
Scott A. Morton ◽  
James R. Forsythe ◽  
Russell M. Cummings
Keyword(s):  
Delta Wing ◽  
Detached Eddy Simulation ◽  
Eddy Simulation

Detached-Eddy Simulations and Reynolds-Averaged Navier-Stokes Simulations of Delta Wing Vortical Flowfields

2002 ◽  
Vol 124 (4) ◽  
pp. 924-932 ◽  
Author(s):  
Scott Morton ◽  
James Forsythe ◽  
Anthony Mitchell ◽  
David Hajek
Keyword(s):  
Vortex Breakdown ◽  
Delta Wing ◽  
Turbulence Models ◽  
Reynolds Numbers ◽  
Navier Stokes ◽  
Detached Eddy Simulation ◽  
Fighter Aircraft ◽  
Eddy Simulation ◽  
Reynolds Averaged Navier Stokes ◽  
High Reynolds

An understanding of vortical structures and vortex breakdown is essential for the development of highly maneuverable vehicles and high angle of attack flight. This is primarily due to the physical limits these phenomena impose on aircraft and missiles at extreme flight conditions. Demands for more maneuverable air vehicles have pushed the limits of current CFD methods in the high Reynolds number regime. Simulation methods must be able to accurately describe the unsteady, vortical flowfields associated with fighter aircraft at Reynolds numbers more representative of full-scale vehicles. It is the goal of this paper to demonstrate the ability of detached-eddy Simulation (DES), a hybrid Reynolds-averaged Navier-Stokes (RANS)/large-eddy Simulation (LES) method, to accurately predict vortex breakdown at Reynolds numbers above 1×106. Detailed experiments performed at Onera are used to compare simulations utilizing both RANS and DES turbulence models.

scholarly journals Numerical Investigation on Unsteady Separation Flow Control in an Axial Compressor Using Detached-Eddy Simulation

2019 ◽  
Vol 9 (16) ◽  
pp. 3298 ◽  
Author(s):  
Mingming Zhang ◽  
Anping Hou
Keyword(s):  
Flow Control ◽  
Excitation Frequency ◽  
Axial Compressor ◽  
Separation Flow ◽  
Pressure Side ◽  
Detached Eddy Simulation ◽  
Eddy Simulation ◽  
Unsteady Separation ◽  
Inherent Frequency ◽  
The Impact

Unsteady excitation has proved its effectiveness in separation flow control and has been extensively studied. It is observed that disordered shedding vortices in compressors can be controlled by unsteady excitation, especially when the excitation frequency coincides with the frequency of the shedding vortex. Furthermore, former experimental results indicated that unsteady excitation at other frequencies also had an impact on the structure of shedding vortices. To investigate the impact of excitation frequency on vortex shedding structure, the Detached-Eddy Simulation (DES) method was applied in the simulation of shedding vortex structure under unsteady excitations at different frequencies in an axial compressor. Effectiveness of the DES method was proved by comparison with URANS results. The simulation results showed a good agreement with the former experiment. The numerical results indicated that the separation flow can be partly controlled when the excitation frequency coincided with the unsteady flow inherent frequency. It showed an increase in stage performance under the less-studied separation flow control by excitation at a certain frequency of pressure side shedding vortex. Compared with other frequencies of shedding vortices, the frequency of pressure side shedding vortex was less sensitive to mass-flow variation. Therefore, it has potential for easier application on flow control in industrial compressors.

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