Numerical Simulation of Cavitating Flows with Compressibility Effects

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Mahmoudi, Zakaria | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42933 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Hejranfar, Kazem
Abstract:
In this study, the numerical simulation of cavitating flows with compressibility effects is performed. The algorithm employs the multiphase Euler equations with homogeneous equilibrium model. The baseline differential equations system is similar to the one-phase system of equations and comprised of the mixture density, mixture momentums and mixture energy equations. Thephases considered for cavitating flows is liquid-vapor and liquid-gas fields. The system of governing equations is discretized using a cell-centered finite volume AUSM’s upwind scheme. The computations are presented for steady noncavitating/cavitating flows around 1D/2Dproblems for different conditions. A sensitivity study is conducted to evaluate the effects of various parameters such as order of accuracy of the numerical method and grid size on the performance of the solution. The results are compared with the available numerical and experimental data. The studyshows that the solution algorithm presented is accurate and efficient for predicting noncavitating/cavitating flows and that the compressibility effects on the flow field characteristic are of prime importance in high speeds
Keywords:
Cavitation Flow ; Compressibility ; Advection Upwind Splitting Method (AUSM) ; Multiphase Euler Equations ; Homogeneous Equilibrium Model

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