论文信息 - 3D casing-distributor analysis with a novel block coupled OpenFOAM solver for hydraulic design application

3D casing-distributor analysis with a novel block coupled OpenFOAM solver for hydraulic design application

Nowadays, computational fluid dynamics is commonly used by design engineers to evaluate and compare losses in hydraulic components as it is less expensive and less time consuming than model tests. For that purpose, an automatic tool for casing and distributor analysis will be presented in this paper. An in-house mesh generator and a Reynolds Averaged Navier-Stokes equation solver using the standard k-ω SST turbulence model will be used to perform all computations. Two solvers based on the C++ OpenFOAM library will be used and compared to a commercial solver. The performance of the new fully coupled block solver developed by the University of Lucerne and Andritz will be compared to the standard 1.6ext segregated simpleFoam solver and to a commercial solver. In this study, relative comparisons of different geometries of casing and distributor will be performed. The present study is thus aimed at validating the block solver and the tool chain and providing design engineers with a faster and more reliable analysis tool that can be integrated into their design process.

[1] D. Spalding,et al. A calculation procedure for heat, mass and momentum transfer in three-dimensional parabolic flows , 1972 .

[2] F. Menter. Two-equation eddy-viscosity turbulence models for engineering applications , 1994 .

[3] Vinayak Eswaran,et al. A numerical study on flow through the spiral casing of a hydraulic turbine , 1998 .

[4] Gautam Biswas,et al. Analysis of flow in the plate-spiral of a reaction turbine using a streamline upwind Petrov-Galerkin method , 2000 .

[5] Håkan Nilsson,et al. Assessment of turbulence modelling for CFD simulations into hydroturbines: spiral casings , 2003 .

[6] Hrvoje Jasak,et al. Development of a Generalized Grid Mesh Interface for Turbomachinery simulations with OpenFOAM , 2008 .

[7] Christophe Devals,et al. Steady and unsteady flow computation in an elbow draft tube with experimental validation , 2011 .

[8] Christophe Devals,et al. CFD methodology for desynchronized guide vane torque prediction and validation with experimental data , 2012 .

[9] Florentina Bunea,et al. NUMERICAL SIMULATION OF THE FLOW IN THE DRAFT TUBE OF THE KAPLAN TURBINE , 2012 .

[10] M. Darwish,et al. Development of a Novel Fully Coupled Solver in OpenFOAM: Steady-State Incompressible Turbulent Flows , 2014 .

[11] M. Darwish,et al. Development of a Novel Fully Coupled Solver in OpenFOAM: Steady-State Incompressible Turbulent Flows in Rotational Reference Frames , 2014 .