摘要
Abstract
Currently, model test and value analysis are the main means for the study of the cavitation failure force in the hydraulic struc-tures.In the value analysis, the cavitatio model is mostly applied.Selection of the cavitation model largely impacts calculation of cavitati-on flowing.The cavitation model based on Rayliegh-Plesset equation is widely applied.Among the cavitation models, the representative ones are Schnerr &Sauer, Singhal and Zwart.In the paper, the three models above mentioned are applied to simulate, in steady-state and non-steady-state values, the cavitation flowing phenomenon of the square body.The flow model applies sst k-ωmodel.In combina-tion with UDF (user defines function) method in commercial software, the model viscosity is corrected.The calculation shows that ro-bustness of Zwart, Schnerr and Sauer models are better than that of Singhal model.Furthermore, the obvious air bubble movement can be seen.Distribution of the pressure coefficient of the wall surface from Schnerr and Sauer models is most close to the experimental value.In the non-steady-state calculation, the periodic phase variation process caused by the periodic variation of the quality cavitation source can be obtained by Singhal model.关键词
空化/Rayliegh-Plesset/sst k-ω/紊流/模型Key words
cavitation/Rayliegh-Plesset/sst k-ω/turbulent flow/model分类
建筑与水利
