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| Based on δ-LES-SPH for simulating turbulence over stepped spillway |
| Received:May 25, 2021 Revised:July 06, 2021 |
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| DOI：10.7511/jslx20210525001 |
| KeyWord:δ-SPH LES stepped spillway high Reynolds number energy dissipation rate |
| Author | Institution |
| 高仁祖 |
青海大学水利电力学院, 西宁 ;黄河上游生态保护与高质量发展实验室, 西宁 |
| 吴海涛 |
青海大学水利电力学院, 西宁 ;黄河上游生态保护与高质量发展实验室, 西宁 |
| 顾声龙 |
青海大学水利电力学院, 西宁 ;黄河上游生态保护与高质量发展实验室, 西宁 |
| 田丽蓉 |
青海大学水利电力学院, 西宁 ;黄河上游生态保护与高质量发展实验室, 西宁 |
| 郑温刚 |
青海大学水利电力学院, 西宁 ;黄河上游生态保护与高质量发展实验室, 西宁 |
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| Abstract: |
| In the δ-LES-SPH model,compared with the traditional SPH model,the diffusion term and the viscosity term are added to the governing equation to enhance the stability,and the coefficients of the two terms are determined by the turbulence model.Based on the δ-LES-SPH model proposed by Mascio,δ-LES-SPH model is implemented and validated by dam break and broad crested weir.The results of δ-LES-SPH are compared with the values of reference to verify the stability and accuracy of δ-LES-SPH for studying turbulent flows with a high Reynolds number.Then,the δ-LES-SPH model is used to analyze the flow characteristics of the stepped spillway.The results show that the δ-LES-SPH model is in good agreement with the experimental values,which is better than the DualSPHysics method.The energy dissipation rates of the 31-step and 26-step stepped spillway respectively reached 75.89% and 74.72%.The efficiency of 31-step is obviously better than that of 26-step,which fully reflects the energy dissipation effect of the stepped spillway. |
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