벤츄리관 형상이 제트 믹서의 성능에 미치는 영향

초록

In this paper, a numerical analysis was performed to analyze the effects of a venturi pipe on mixing performance of a jet mixer used for liquid agitation in a large capacity fluid storage tank. The numerical analysis was performed by using the three-dimensional Reynolds-averaged Navier-Stokes equations and standard k-ε turbulent model. In order to evaluate the mixing performance of the jet mixer for different shapes of the venturi pipe, three geometric parameters, i.e., the throat area of venturi pipe, distance between nozzle and venturi pipe and diffuser angle, were used. It was found that a low pressure region was generated near the throat of the venturi pipe. And, the characteristics of the surrounding fluid flowing into the venturi pipe by the pressure difference were observed. The mixing efficiency was most affected by the diffuser angle, and the maximum mixing efficiency of 39.35% was achieved at a diffuser angle of 5.0˚.

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