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Evaluation of Performance in Semi-Open Type Impeller by Duplex Stainless Material for Ballast Water Centrifugal Pump
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 Title & Authors
Evaluation of Performance in Semi-Open Type Impeller by Duplex Stainless Material for Ballast Water Centrifugal Pump
Lee, Jin-Woo; Kim, Yun-Hae; Gang, Young-Gwan; Lee, Sang-Hoon;
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A special usage impeller pump for ballast water treatment is part of an offshore plant's structure. It has to maintain a high corrosion resistance in an extreme environment, in which it can contact several kinds of aqueous solutions. The duplex stainless steel used in such severe environments is known to have corrosion resistance and excellent mechanical properties. This study estimated the performance of an impeller pump system designed using duplex stainless steel through a computational fluid dynamics analysis. As a result, it was determined that the pressure drop increases and the impeller performance is lowered if the equivalent roughness is enlarged. The surface precision of the duplex stainless steel must be consistently maintained. If thisis the case, it was determined that the existing STS steel can be substituted for the Duplex stainless steel.
Duplex stainless steel;Impeller;Ballast water;Computational fluid dynamics analysis;
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