LES NUMERICAL SIMULATION OF CAVITATION BUBBLE SHEDDING ON ALE 25 AND ALE 15 HYDROFOILS  

作　　者：LIU De-min LIU Shu-hong WU Yu-lin XU Hong-yuan 

机构地区：[1]State Key Laboratory of Hydro Science and Hydraulic Engineering, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Journal of Hydrodynamics》2009年第6期807-813,共7页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.10532010,90410019)

摘　　要：A cavitation calculation scheme is developed and applied to ALE 15 and ALE 25 hydrofoils, based on the Bubble Two-phase Flow （BTF） cavity model with a Large Eddy Simulation （LES） methodology. The Navier-Stokes equations including cavitation bubble clusters are solved through the finite-volume approach with a time-marching scheme. Simulations are carried out in a 3-D field with a hydrofoil ALE 15 or ALE 25 at an angle of attack of 8^0 and cavitation number σ = 2.3 with α 2× 10^6, meshing system. With the time-marching, the cavitation bubble gradually grows to a steady lump shape and then produces an irregular small bubble behind the main cavitation bubble, finally shedding from the leading edge of the cloud cavitation structure. The calculated results including velocity field and pressure field are consistent with experiment data at the same Reynolds number and cavitation number. The vortex and reverse flow are observed on the hydrofoil surface.A cavitation calculation scheme is developed and applied to ALE 15 and ALE 25 hydrofoils, based on the Bubble Two-phase Flow （BTF） cavity model with a Large Eddy Simulation （LES） methodology. The Navier-Stokes equations including cavitation bubble clusters are solved through the finite-volume approach with a time-marching scheme. Simulations are carried out in a 3-D field with a hydrofoil ALE 15 or ALE 25 at an angle of attack of 8^0 and cavitation number σ = 2.3 with α 2× 10^6, meshing system. With the time-marching, the cavitation bubble gradually grows to a steady lump shape and then produces an irregular small bubble behind the main cavitation bubble, finally shedding from the leading edge of the cloud cavitation structure. The calculated results including velocity field and pressure field are consistent with experiment data at the same Reynolds number and cavitation number. The vortex and reverse flow are observed on the hydrofoil surface.

关 键 词：CAVITATION ALE hydrofoil Large Eddy Simulation （LES） 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置] U674.944[自动化与计算机技术—控制科学与工程]