Numerical study of unsteady cavitation on 2D NACA0015 hydrofoil using free/open source software  

作　　者：Victor Hidalgo Xianwu Luo Bin Ji Alvaro Aguinaga 

机构地区：[1]State Key Laboratory of Hydroscience and Engineering,Tsinghua University [2]Mechanical Engineering Departments, Escuela Politecnica Nacional University

出　　处：《Chinese Science Bulletin》2014年第26期3276-3282,共7页

基　　金：financially supported by the National Natural Science Foundation of China (51206087, 51179091 and 51376100);the Major National Scientific Instrument and Equipment Development Project (2011YQ07004901)

摘　　要：The free/open source software as OpenFOAM,Salome meshing and python language under Debian Linux system are evaluated to model unsteady cavitating turbulent flow around a NACA0015 hydrofoil. Based on the cavitation model proposed by Kunz and large eddy simulation(LES) method, we denote the benefits of free software and open source tools as an alternative to proprietary software of computational fluid mechanics, and provided a modified cavitation model to improve numerical accuracy.The simulation results of typical break-off cycle for cavitation shedding are compared to available experimental data, and validated using image processing to find percentage of similarities. The sheet cavity frequency of 7.752 Hz was obtained based on cavitation evolution and pressure fluctuations. The study gives relevant information for CFD software development in the future.The free/open source software as OpenFOAM, Salome meshing and python language under Debian Linux system are evaluated to model unsteady cavitating turbulent flow around a NACA0015 hydrofoil. Based on the cavitation model proposed by Kunz and large eddy simu- lation （LES） method, we denote the benefits of free software and open source tools as an alternative to proprietary software of computational fluid mechanics, and provided a modified cavitation model to improve numerical accuracy. The simulation results of typical break-off cycle for cavitation shedding are compared to available experimental data, and validated using image processing to find percentage of similarities. The sheet cavity frequency of 7.752 Hz was obtained based on cavitation evolution and pressure fluctuations. The study gives relevant information for CFD software development in the future.

关 键 词：空化模型 开源软件 自由软件 非定常 数值研究 水翼 PYTHON语言 LINUX系统 

分 类 号：O35[理学—流体力学]