Kozulovic, Dragan and Röber, Thomas (2006) Modelling the Streamline Curvature Effects in Turbomachinery Flows. In: ASME-Paper. ASME Turbo Expo 2006, 2006-05-08, Barcelona, Spain.
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Turbomachinery flows show significant streamline curvature with corresponding effects on turbulence development. Generally, linear eddy viscosity turbulence models, which are widely used in industrial aerodynamic design, do not predict these effects accurately, leading to less reliable RANS-simulations. In this work, therefore, a modification is made to the two-equation turbulence model of Wilcox. Although this extension is a simple and pragmatic approach, the effects of streamline curvature are accurately reproduced for many presented applications, ranging from simple generic test cases to multistage compressor flows. Improved predictions of performance maps are achieved, which is mainly due to improved modelling in regions with higher streamline curvature, e.g. tip vortex and end-wall boundary layers. The curvature correction enables a greater mass flow range to be simulated and increases the numerical stability. Furthermore, the new approach requires only local variables, which makes it applicable to complex flows and easy to implement in existing codes.
|Document Type:||Conference or Workshop Item (Paper)|
|Additional Information:||Paper No. GT2006-90265|
|Title:||Modelling the Streamline Curvature Effects in Turbomachinery Flows|
|Date:||8 May 2006|
|Journal or Publication Title:||ASME-Paper|
|In ISI Web of Science:||No|
|Keywords:||turbomachinery, turbulence modelling, streamline curvature|
|Event Title:||ASME Turbo Expo 2006|
|Event Location:||Barcelona, Spain|
|Event Type:||international Conference|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||Propulsion Systems|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ER - Engine Research|
|DLR - Research theme (Project):||L - Virtual Engine and Validation Methods|
|Institutes and Institutions:||Institute of Propulsion Technology > Numerical Methodes|
|Deposited By:||Dragan Kozulovic|
|Deposited On:||27 Nov 2006|
|Last Modified:||27 Apr 2009 13:15|
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