평면벽면분류의 유입경계조건을 가지는 개수로 유동 및 배플의 영향에 관한 실험적 연구

Abstract

Flow behaviors of the open channel type flow with its geometric boundary conditions being similar to that of the Multi-Stage-Flash evaporator were studied qualitatively by measuring the volocity distribution. Without a baffle, the flow was in the shape of a simple submerged plane wall jet. At the downstream of this flow, the jet boundary made sharp curve toward the free surface ; this is because the entrainment of the ambient liquid is restricted by the free surface boundary, similar to the Coanda effect. According to the experimental results the level of the free surface appeared to be the most important parameter. The flow with a baffle was in much complicated shape ; especially the recirculating region at the downstream free surface was detected according to the experimental conditions imposed. inlet liquid velocity, heights of the liquid level ad the baffle, and the opening height of sluice gate at the entrance were the most important parameters in the baffle flow.