Numerical Study Of Horizontal Tidal Current Turbine By Using PimpleDyMFoam

Numerical simulation of Horizontal Tidal Current Turbine (HTCT) is performed based on free CFD solver PimpleDyMFoam in the paper. Horizontal axis tidal current turbine is a special turbomachinery with low blade solidity and low rotating speed. Generally, Multiple Reference Frame (MRP) method is used for numerical simulation of HTCT. However, facing the fact that most of the fluid flows through the turbine plane of rotation for HTCT flow makes the MFR method unavaiable.PimpleDyMFoam solver is based on the DynamicMesh method which could be used to solve incompressible unsteady flow dynamics. The computational domain is divided into dynamic and stationary mesh domain by using PimpleDyMFOAM to simulate rotating machinery case, Flux exchange is guaranteed between different domains with Arbitrary Mesh Interface (AMI), that can ensure the conservation of the interface flux between dynamic grid domain and stationary grid domian. DynamicMesh method is suitable for the HTCT numerical analysis.Firstly, The validation and assessment of PimpleDyMFOAM model have been conducted through simulating ERCOFTAC centrifugal pump. ERCOFTAC centrifugal pump has7impeller blades and12diffuser vanes with a constant rotational speed of2000rpm. The computational results obtained by PimpleDyMFoam are compared with those obtained by TurbDyMFoam and also the experimental data.And then, numerical simulation of DUTTCT turbine which is kilowatt-power and deve-lopped by Dalian University of Technology is proceed with PimpleDyMFoam. The computa-tional results are analyzed and compared with the experiment results. Based on research word done above, PimpleDyMFoam is believed to be a novel and effective tool and method for numerical simulation of HTCT.