| 邓云,李嘉,罗麟,赵文谦.水库温差异重流模型的研究[J].水利学报,2003,34(7): |
| 水库温差异重流模型的研究 |
| Temperature prediction model for reservoirs |
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| DOI： |
| 中文关键词: 水库 水温 异重流 三维数学模型 |
| 英文关键词: reservoir temperature difference thermal density flow 3-D mathematical model |
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| 中文摘要: |
| 本文采用三维Spalart模型、k-ε模型和RSM雷诺应力模型，分别对水库温差异重流进行了模拟。以水库模型实验数据为判别依据，比较了几个模型的计算结果。RSM模型能相当准确地模拟水库中温差异重流的潜入、推进及库区涡流的形成过程。RSM模型模拟精度高，但其计算量大，收敛性和稳定性较差。K-ε模型收敛容易，且精度不差。在RSM模型计算不易收敛和工程应用中对精度要求不太高的情况下，k-ε模型不失为一种较好的选择。单方程的Spalart模型模拟精度差，不建议采用。 |
| 英文摘要: |
| 3-D Spalart, k-ε and RSM models are applied to simulate the thermal density flow in reservoir. The advantage and accuracy of these models are studied by comparing the calculation results with perimental data. It is shown that the RMS model can well predict the entering and progress of the stratified flow as well as the formation of eddy in the reservoir. It possesses the highest accuracy but has difficulty in convergence, stability and time consumption. Whereas, the k-ε model is much more easy to converge and suitable for engineering application, although its ccuracy is less than that of RSM model. |
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