Application of hybrid CFD/CAA technique for modeling pressure fluctuations in transonic flows

• Autorzy: Dykas S. , Wróblewski W. , Rulik S.
• Języki publikacji: EN

Abstrakty

EN

Solving AeroAcoustics (CAA) problems by means of the Direct Numerical Simulation (DNS) or even the Large Eddy Simulation (LES) for a large computational domain is very time consuming and cannot be applied widely for engineering purposes. In this paper in-house CFD and CAA codes are presented. The in-house CFD code is based on the LES approach whereas the CAA code is an acoustic postprocessor solving non-linearized Euler equations for fluctuating (acoustic) variables. These codes are used to solve the pressure waves generated aerodynamically by a flow over a rectangular cavity and by the vortex street behind a turbine blade. The obtained results are discussed with respect to the application of the presented numerical techniques to pressure waves modeling in steam turbine stages.

Słowa kluczowe

EN

transonic flow; aeroacoustic noise; hybrid technique

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2013
• Tom: Vol. 17, No 3-4
• Strony: 145--154
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Dykas S.

• Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Konarskiego 18, 44-100 Gliwice, Poland

autor

Wróblewski W.

• Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Konarskiego 18, 44-100 Gliwice, Poland

autor

Rulik S.

• Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Konarskiego 18, 44-100 Gliwice, Poland

Bibliografia

• [1] Dykas S, Wróblewski W, Rulik S and Chmielniak T 2010 Archives of Acoustics 35 (1) 35
• [2] Ahuja K K and Mendoza J 1964 Effects of Cavity Dimensions, Boundary Layer, and Temperature on Cavity Noise with Emphasis on Benchmark Data to Validate Computational Aeroacoustic Codes, NASA CR 4653
• [3] Weyna S 2005 Acoustic Energy Dissipation of Real Sources, WNT, Warsaw (in Polish)
• [4] Takeda K and Shieh C M 2013 Int. J. Comput. Fluid Dynamics 18 (6) 439
• [5] Wróblewski W, Dykas S, Gardzilewicz A and Kolovratnik M 2009 ASME J. Fluids Engineering 131 041301-1
• [6] Dykas S, Rulik S and Wróblewski W 2012 Open J. Fluid Dynamics 2 65
• [7] Wróblewski W 2000 Numerical Simulation of Flow Phenomena in Turbines, Silesian University of Technology Publishing, Energetyka, 132 (in Polish)