横軸形かくはん式薄膜蒸発機内の流れに及ぼす重力の影響

概要

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A Liquid-fillet is formed in front of agitator-blades in the cylinder of a horizontal agitated thin-film evaporator. The thickness of the liquid-fillet varies periodically due to the gravity while the blade moves around inside the cylinder. The authors' theory reveals that usually it is in the sub-critical condition, and the maximum thickness of the fillet is observed while the blade is going up. As it approaches the critical condition the amplitude of the oscilation is increased to infinity and the phase suddenly advances 180 deg at the critical condition. Experimental data agreed well with the prediction when it was far from the critical condition. Near the critical condition the amplitude was increased and the phase was advanced about 60 deg ; that is, the transition from subcritical to super critical occurred continuously.
社団法人日本機械学会の論文
1988-04-25