| 旋风分离器内气相流场的相似模化分析（Ⅰ）流动参数 |
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| 引用本文： | 魏耀东,宋健斐,陈建义,万古军,朱廷钰.旋风分离器内气相流场的相似模化分析（Ⅰ）流动参数[J].化工学报,2010,61(9):2265-2273. |
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| 作者姓名： | 魏耀东 宋健斐 陈建义 万古军 朱廷钰 |
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| 作者单位： | 中国石油大学（北京）重质油国家重点实验室;中国科学院过程工程研究所 |
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| 基金项目： | 国家自然科学基金项目，国家高技术研究发展计划项目 |
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| 摘 要： | 基于数值模拟方法分析了流动参数变化对旋风分离器内气相旋转流流场模化特性的影响。选择直径φ300 mm的旋风分离器为计算模型，在入口气速0.5～30 m·s-1、气体温度293～1273 K和操作压力0.1～6.5 MPa范围内，分析了流动参数变化对流场量纲1速度分布相似性的影响，考察了常规参数模型与高参数原型之间的流场模化关系。模拟结果表明，流动参数变化后，虽然旋风分离器内旋转流流场仍呈现准自由涡与强制涡分布形态，但流场的量纲1速度分布不能保持完全恒定和相似，存在着一定的变化。然而当入口速度高于20 m·s-1，或压力高于3.0 MPa时，流场量纲1速度可以基本保持恒定，不再随流动参数变化而改变，Euler数与Reynolds数不相关，近似处于流场的自模区;当温度超过1000 K后，Euler数基本不受Reynolds数变化的影响，流场也可以保持相似性。最后从能量损失的观点，讨论了Reynolds数和Euler数之间的相互关系，分析了流动参数对旋风分离器气相旋转流流场自模特性作用的机理。
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| 关 键 词： | 旋风分离器 流场 数值模拟 模化分析 自模特性 |
Similarity analysis on modeling of gas phase flow field in cyclone separator (Ⅰ) Flow parameters |
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| WEI Yaodong,SONG Jianfei,CHEN Jianyi,WAN Gujun,ZHU Tingyu.Similarity analysis on modeling of gas phase flow field in cyclone separator (Ⅰ) Flow parameters[J].Journal of Chemical Industry and Engineering(China),2010,61(9):2265-2273. |
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| Authors: | WEI Yaodong SONG Jianfei CHEN Jianyi WAN Gujun ZHU Tingyu |
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| Abstract: | The gas phase flow fields in cyclone separators in the same size are simulated with different flow parameters.The diameter of the cyclone was 300 mm.The inlet velocities range from 0.5 to 30 m·s-1, the gas temperatures range from 293 to 1273 K, and the pressures in the cyclone separator are from 0.1 to 6.5 MPa, which are the flow parameters usually used in the industry.Based on the simulation results, the effect of flow parameters on the similarity of dimensionless velocity is investigated.The similarity criterion of flow field in the model and prototype is also analyzed.The results show that the flow fields are similar for different flow parameters, but the dimensionless velocities are different.When the inlet velocity is higher than 20 m·s-1, or the pressure is higher than 3.0 MPa, the Euler number approaches a constant. It is not affected by Reynolds number, so the flow field keeps approximate similarity.When the temperature is higher than 1000 K, the influence of Reynolds number on Euler number is very weak, so that the flow field also keeps self-similarity.Moreover, the mechanics of the self-similarity of flow field is discussed in view of the energy losses and the relationship between Euler and Reynolds number. |
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