Progress in Numerical Simulation of Turbulent Cavitating Flow in an Axial Waterjet Pump

9th International Symposium on Cavitation

Kim, Sung-Eun^1

Naval Surface Warfare Center, Carderock Division, 9500 McArthur Blvd., West Bethesda

MD

20817, United States^1

关键词: Computational approach;    Finite-rate mass transfer;    Large-scale coherent structures;    Navier-Stokes solver;    Quantities of interests;    Reynold-averaged Navier-Stokes;    Salient features;    Tip leakage vortex;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012064/pdf
DOI  :  10.1088/1742-6596/656/1/012064

来源: IOP

【 摘 要 】

A progress made in numerical simulation of turbulent cavitating flow in an axial waterjet pump (ONR AxWJ-2) is presented. The computational approach is designed to resolve the interaction between the rotor and the stator both in time and in space comprising the full 360° sector of the pump, using a scalable finite-volume-based Navier-Stokes solver. Unsteady Reynold-Averaged Navier-Stokes (URANS) and a hybrid of URANS and Large Eddy Simulation (LES) are employed for turbulence modeling and also for directly capturing some of large-scale coherent structures in the flow. A continuum mixture approach based on phasic volume-fraction is adopted along with a finite-rate mass-transfer model. It is shown that both the major quantities of interest (QOI) of waterjet pumps and the salient features of the flow such as tip-leakage vortex (TLV) cavitation can be predicted with a commendable accuracy.