横軸形かくはん式薄膜蒸発機内の流れの研究 : 第6報, 出口溝への流出状態と全体性能の予測

概要

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Regarding the outlet condition of flow from thin-film evaporators, it was postulated that the liquid fillet adjusted the width at the exit so that the energy of flow was minimum at a section about 15 times the thickness of liquid fillet upstream from the exit. By comparing a series of experimental data with theoretical calculation, it was demonstrated that this postulate was good for liquid of viscosity less than 6mm^2/s but not for liquid of viscosity higher than 17mm^2/s. Based on the hypothesis, the exit width of liquid fillet is predicted, and the overall pattern of liquid fillet in an evaporator can be calculated using the predicted exit width as the initial condition. Predicted flow pattern in the entire evaporator was compared with experimental data at different operating conditions, and good agreement was demonstrated in all cases except near the inlet zone where the flow pattern was disturbed by the incoming condition of fluid.
社団法人日本機械学会の論文
1992-03-25