The Fluid Field Numerical Simulation Of Centrifugal Pump Based On Parallel Computation Technology And 3D Design Software Development

With the development of modern computer fluid dynamics, the need for high performance and high capacity becomes more and more urgent., computation becomes more and more complex, scale develops with positive exponent. For such tremendous calculation tasks, a single computer is not able to complete these computations obviously: one is the limited capability of single processor; the other is those special expensive parallel computers are too expensive and formerly resource have to be abandoned, which is waste. Therefore, it is necessary and realistic meaning for us to develop an effective parallel calculating technology, platform and realizing method for different researchers, at the same time we can use present computer software and hardware resources fully. In the basis of the references on a centrifugal pump of two-phase fluids from domestic and oversea, its theory of boundary layer is presented and set up and the modular curve equation of vane is received in this paper. It divides into 7 chapters.The introduction is in chapter one, which summarizes the research results of parallel computation technology in domestic and oversea and illuminates the research aim, significant and main contents.In chapter two, through deep research to windows 2000 operation system, wehave construct a parallel PC cluster-based system with 4 computers; also can extending more computer nodes easily. We use message passing interface (MPI) as a method to program parallel software, then MPICH has been installed and use C langue to call MPI function warehouse. Finally, we have made and realized parallel iterative arithmetic, matrix of two-dimensional and topological arithmetic, three-dimensional topological arithmetic, molecule dynamics simulation and three-dimensional graphics processing parallel programs.In chapter three, we researches the generation of sub domain mesh and the adjacent domain mesh under parallel environment, firstly improve the R lohner's wave front domain-splitting algorithm so that the sub grids and their boundaries are more favorable for grid generation. A new optimization strategy of sub domain's boundary is then presented in order to improve the smoothness of boundaries and the quality of grids. After subdividing the initial meshes by using the above domain-splitting algorithm, we smooth the grid by the parallel method.In chapter four, the NS solver is developed from Euler equation code by adding viscous terms and two-equation turbulence models. In order to get a better result, the improved Jameson second and forth artificial dissipation is used, the implicit residual...