선박평형수 살균처리기 내 고정 혼합기 형상에 따른유체의 혼합특성에 관한 수치해석적 연구

Abstract

Ballast water refers to seawater loaded into ballast tanks to balance ships. To prevent marine pollution, thesterilization of ballast water in ships is essential. The methods for sterilizing ballast water include chemicaland electrolytic treatments, as well as other methods. The purpose of this study was to improve theefficiency of the electric sterilization method by varying the cross-junction and twisting number of the staticmixer elements to investigate their effects on pressure drop and mixing. As a result, when the twisting number ofstatic mixers was high, the shape of the cross-junction static mixer elements yielded a higher pressure drop than that of thecontinuously bonded elements but with a lower vorticity. When the twisting number of the static mixer was low, there was nosignificant change in the pressure drop or vorticity, regardless of whether the elements were crossed. Because it is believed thatthe pressure drop will have a greater impact than vorticity on the mixing of seawater within the pipe, a static mixer with ahigh twisting number and cross-junction elements is considered the most suitable shape.