scholarly journals Wall-Resolved Large-Eddy Simulations of Transonic Shock-Induced Flow Separation

2018 ◽  
Author(s):  
Ali Uzun ◽  
Mujeeb R. Malik
Keyword(s):  
Flow Separation ◽  
Large Eddy Simulations ◽  
Transonic Shock ◽  
Large Eddy ◽  
Induced Flow

scholarly journals LARGE EDDY SIMULATIONS OF HIGH ROSSBY NUMBER FLOW IN THE HIGH PRESSURE COMPRESSOR INTER-DISK CAVITY

2021 ◽  
pp. 1-22
Author(s):  
Deepak Saini ◽  
Richard Sandberg
Keyword(s):  
Rayleigh Number ◽  
Outer Region ◽  
Large Eddy Simulations ◽  
Rossby Number ◽  
Air Cooling ◽  
Large Eddy ◽  
Number Flow ◽  
Induced Flow ◽  
Inner Region ◽  
Buoyancy Induced Flow

Abstract The focus of the present study is to understand the effect of Rayleigh number on a high Rossby number flow in a high pres- sure compressor (HPC) inter-disk cavity. These cavities form between the compressor disks of a gas turbine engine, and they are an integral part of the internal air cooling system. We perform highly resolved large eddy simulations for two Rayleigh numbers of 0.76 × 108 and 1.54 × 108 at a fixed Rossby number of 4.5 by solving the compressible Navier–Stokes equations. The results show a flow structure dominated by a toroidal vortex in the inner region of the cavity. In the outer region, the flow is observed to move radially outwards by Ekman layers formed on the side disks and to move radially inwards through the central core region of the cavity. An enhancement in the intensity of the radial flares is observed in the outer region of the cavity for the high Rayleigh number case with no perceivable effect in the inner region. The near shroud region is mostly dominated by the centrifugal buoyancy-induced flow and the wall Nusselt number calculated at the shroud is in close agreement with centrifugal buoyancy-induced flow without an axial bore flow.

scholarly journals Large Eddy Simulations of High Rossby Number Flow in the High Pressure Compressor Inter-Disk Cavity

2020 ◽  
Author(s):  
Deepak Saini ◽  
Richard D. Sandberg
Keyword(s):  
Outer Region ◽  
Large Eddy Simulations ◽  
Rossby Number ◽  
High Pressure Compressor ◽  
Large Eddy ◽  
Number Flow ◽  
Induced Flow ◽  
Inner Region ◽  
Buoyancy Induced Flow ◽  
Pressure Compressor

Abstract The focus of the present study is to understand the effect of Rayleigh number on a high Rossby number flow in a high pressure compressor (HPC) inter-disk cavity. These cavities form between the compressor disks of a gas turbine engine, and they are an integral part of the internal air cooling system. We perform highly resolved large eddy simulations for two Rayleigh numbers of 0.76 × 108 and 1.54 × 108 at a fixed Rossby number of 4.5 by solving the compressible Navier–Stokes equations. The results show a flow structure dominated by a toroidal vortex in the inner region of the cavity. In the outer region, the flow is observed to move radially outwards by Ekman layers formed on the side disks and to move radially inwards through the central core region of the cavity. An enhancement in the intensity of the radial flares is observed in the outer region of the cavity for the high Rayleigh number case with no perceivable effect in the inner region. The near shroud region is mostly dominated by the centrifugal buoyancy-induced flow and the wall Nusselt number calculated at the shroud is in close agreement with centrifugal buoyancy-induced flow without an axial bore flow.

Automotive Flow and Acoustic Predictions using Large Eddy Simulations

2012 ◽  
Vol 39 (3) ◽  
pp. 272-289 ◽  
Author(s):  
Bahram Khalighi ◽  
Gianluca Iaccarino ◽  
Yaser Khalighi
Keyword(s):  
Large Eddy Simulations ◽  
Large Eddy

Large-eddy simulations and lidar measurements of vortex-pair breakup in aircraft wakes

AIAA Journal ◽  
1998 ◽  
Vol 36 ◽  
pp. 1439-1445 ◽  
Author(s):  
D. C. Lewellen ◽  
W. S. Lewellen ◽  
L. R. Poole ◽  
C. A. Hostetler ◽  
R. J. DeCoursey ◽  
...  
Keyword(s):  
Vortex Pair ◽  
Large Eddy Simulations ◽  
Large Eddy ◽  
Lidar Measurements
Sign in / Sign up

Export Citation Format

Share Document