| 徐英,吴经纬,杨会峰,张涛.内锥流量计流出系数预测方法研究[J].计算力学学报,2009,26(5):727~733 |
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| 内锥流量计流出系数预测方法研究 |
| Predicting discharge coefficient of V-Cone flowmeter with four turbulence models |
| 投稿时间：2007-05-23 |
| DOI：10.7511/jslx20095019 |
| 中文关键词: 内锥流量计 流出系数 CFD(Computational Fluid Dynamics) 湍流模型 涡粘模型 RSM 雷诺数 |
| 英文关键词:V-Cone flowmeter Discharge coefficient CFD Turbulence model Eddy-viscosity models RSM Reynolds number |
| 基金项目:国家"863"计划支持2007AA04Z180资助项目. |
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| 中文摘要: |
| 采用标准k-ε模型、RNG(Renormalization Group)k-ε模型、Realizable k-ε模型和Reynolds应力方程模型 RSM(Reynolds Stress Model) 对100 mm口径6种结构的内锥流量计内流场进行了数值模拟。在等效直径比β值为0.65的三种结构内锥流量计流出系数的仿真计算中,四种湍流模型计算结果与物理实验结果误差的平均值分别为4.19％,2.84％,2.88％和-0.822％;对β值为0.85的情况,各模型计算误差的平均值分别为11.8％,9.62％,9.30％和4.76％。研究结果表明,RSM模型在6种结构内锥流量计流出系数的预测中,计算精度较高,表现出了较好的性能,优于三种k-ε涡粘模型,更适于内锥流量计流场数值模拟与流出系数的预测。 |
| 英文摘要: |
| With four turbulence models, like the standard k-ε, the RNG k-ε, the Realizable k-ε and the RSM(Reynolds Stress Model), the internal flow field of six V-Cone flowmeters with the same inside diameter, 100 mm, but varying from structure is simulated here. For three V-Cone flowmeters whose equivalent diameter ratio β equals 0.65, the average deviations between each of the predictions, which are computed by using different turbulence models, and the corresponding experimental results are 4.19％,2.84％,2.88％ and -0.822％ respectively; as for the other three V-Cone flowmeters whose β equals 0.85, the average deviations are 11.8％,9.62％,9.30％ and 4.76％ respectively. Based on these results, a conclusion can be obtained that RSM can predict the discharge coefficients of the V-Cone flowmeters more accurately and perform better than the other three eddy-viscosity models. Therefore, it is the most suitable turbulence model for numerical simulation of the internal flow field of V-Cone flowmeters and is good for its discharge coefficient prediction. |
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