| 流体性质对刮膜式分子蒸馏器上液膜形态的影响 |
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| 引用本文： | 许松林,王小明.流体性质对刮膜式分子蒸馏器上液膜形态的影响[J].农业机械学报,2011,42(10):145-149. |
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| 作者姓名： | 许松林 王小明 |
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| 作者单位： | 天津大学;天津大学 |
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| 基金项目： | 国家自然科学基金资助项目（20776097、20976118） |
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| 摘 要： | 利用高速摄像机对刮膜式分子蒸馏器壁面上的液膜形态进行了研究，实验发现随着进料率和转速的增加，不同物料在蒸发壁面上主要存在4种流动形态：液滴状、股状、不连续液膜和连续均匀液膜，同时测得水、乙醇、质量分数为12%乙二醇溶液、质量分数为50%乙二醇溶液和质量分数为50%丙三醇溶液在不同转速下出现连续均匀薄膜的临界流率。利用高斯过程进行数据预测表明：在一定转速下，临界流率随表面张力的增大而增大,随粘度的增大而减小。
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| 关 键 词： | 刮膜式分子蒸馏 流动形态 临界流率 高斯过程 |
Effect of Fluids Property on Liquid Flow Regimes in Wiped Film Molecular Distillation |
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| Xu Songlin and Wang Xiaoming.Effect of Fluids Property on Liquid Flow Regimes in Wiped Film Molecular Distillation[J].Transactions of the Chinese Society of Agricultural Machinery,2011,42(10):145-149. |
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| Authors: | Xu Songlin and Wang Xiaoming |
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| Institution: | Tianjin University;Tianjin University |
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| Abstract: | A high-speed camera was used to investigate the flow pattern of liquid film. Four regimes were identified as: droplet flow, strand flow, discontinuous film flow and continuous film flow when liquid flow rate increased gradually. Moreover, the critical flow rate of water, ethanol, ethylene glycol and glycerin solution under different rotate speeds were tested. Then the Gaussian process was adopted to predict more data. Results indicated that the critical flow rate increased with the growth of surface tension and decreased as the viscosity increased at certain rotate rate. |
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| Keywords: | Wiped film molecular distillation Flow regimes Critical rate Gaussian process |
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