A STUDY ON OPTIMUM SHAPE OF JET PUMP TYPE FLOW DEVICE

Abstract

 Jet pump type flow device is used as a countermeasure against water pollution in closed water bodies such as lakes and resevoirs. In the conventional study, the theoretical formula of the flow velocity ratio of driving water, absorption water, discharging water is derived under the assumption that it is thoroughly mixed in the mixing pipe and then discharged. In conclusion, there is a condition of the optimal pipe diameter ratio that can obtain the maximum discharge water flow rate from the balance between the two factors, that is, the reduction of the drive water flow rate and the increase of the absorption water flow rate to the drive water flow rate. However, a more than 10 times mixing pipe length is required under the condition of the optimum pipe diameter ratio.