| 湍流模型对微通道内空化流动模拟结果的影响分析 |
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| 作者姓名： | 崔振东 刘斌 蔡军 淮秀兰 |
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| 作者单位： | 1. 中国科学院工程热物理研究所, 北京 100190;
2. 中国科学院大学, 北京 100190 |
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| 基金项目： | 国家自然科学基金(51376181)资助 |
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| 摘 要： | 应用4种湍流模型(标准k-ε模型、标准k-ω模型、Transition SST模型和Transition k-kl-ω模型)对微通道内空化流动进行模拟.通过与实验结果对比,分析4种湍流模型在空化流动模拟计算中的预测能力.结果表明:标准k-ω模型预测的流量和空化流型与实验结果最为接近.Transition SST模型和Transition k-kl-ω模型流量预测结果与实验较为吻合,但流型预测误差较大.标准k-ε模型未能预测出空化流动,不适用于低雷诺数下的空化流动计算.
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| 关 键 词： | 水力空化 微通道 湍流模型 数值模拟 |
| 收稿时间： | 2015-03-13 |
| 修稿时间： | 2015-05-25 |
Analysis of simulation results for cavitating flows in micro-channels using different turbulence models |
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| Authors: | CUI Zhendong LIU Bin CAI Jun HUAI Xiulan |
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| Institution: | 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
2. University of Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | The cavitation flows in micro-channels were numerically investigated using four different turbulence models, and the models are as follows: standard k-ε turbulence model, standard k-ω turbulence model, Transition SST turbulence model, and Transition k-kl-ω turbulence model. In comparison to the experimental results, the prediction abilities of these turbulence models for the cavitation flow were analyzed in details. The results show that both the flow rate and flow pattern predicted by the standard k-ε turbulence model agree well with the experimental results. Although the flow rates predicted by the Transition SST turbulence model and the Transition k-kl-ω turbulence model also agree well with the experimental results, the predicted flow patterns significantly deviate from the experimental ones. The standard k-ε turbulence model failed to predict the cavitation flow, which indicates that it is not suitable for the low Reynolds number flow circumstance. |
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| Keywords: | hydrodynamic cavitation micro-channel turbulence model numerical simulation |
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