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流體性質(zhì)對刮膜式分子蒸餾器上液膜形態(tài)的影響
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國家自然科學基金資助項目（20776097、20976118）


Effect of Fluids Property on Liquid Flow Regimes in Wiped Film Molecular Distillation
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    摘要:

    利用高速攝像機對刮膜式分子蒸餾器壁面上的液膜形態(tài)進行了研究，實驗發(fā)現(xiàn)隨著進料率和轉(zhuǎn)速的增加，不同物料在蒸發(fā)壁面上主要存在4種流動形態(tài)：液滴狀、股狀、不連續(xù)液膜和連續(xù)均勻液膜，同時測得水、乙醇、質(zhì)量分數(shù)為12%乙二醇溶液、質(zhì)量分數(shù)為50%乙二醇溶液和質(zhì)量分數(shù)為50%丙三醇溶液在不同轉(zhuǎn)速下出現(xiàn)連續(xù)均勻薄膜的臨界流率。利用高斯過程進行數(shù)據(jù)預測表明：在一定轉(zhuǎn)速下，臨界流率隨表面張力的增大而增大,隨粘度的增大而減小。

    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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許松林,王小明.流體性質(zhì)對刮膜式分子蒸餾器上液膜形態(tài)的影響[J].農(nóng)業(yè)機械學報,2011,42(10):145-149. Xu Songlin, Wang Xiaoming. Effect of Fluids Property on Liquid Flow Regimes in Wiped Film Molecular Distillation[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(10):145-149.

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