Authors: Kethidi M, Kovačević A, Stošić N, Rane S
Where published:2012 Begell House , Heat and Mass Transfer , Inc. , Turbulence
Year:2012
Where published:2012 Begell House , Heat and Mass Transfer , Inc. , Turbulence
Year:2012
In order to evaluate how turbulence modelling affects the prediction of flow in screw compressors, the standard k-є, Menter SST and SSG Reynolds Stress turbulence models have been tested and compared with measurements obtained from Laser Doppler Velocimetry (LDV). Numerical aspects such as the choice of differencing schemes and solver characteristics are discussed. This study shows that the choice of numerical schemes and turbulence models has a noticable influence on predicted flow characteritics. It is concluded that CFD predictions of flow characteristics can be improved by better rotor grid generation methods and tuning the turbulence model to suit the flow characteristics of twin screw machines.
Keywords:Computational Fluid Dynamics , grid generation , Laser Doppler Velocimetry , modelling , screw compressor