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논문 기본 정보

저자정보
(서울대학교) (서울대학교) (한국생산기술연구원) (한국기계연구원) (한국기계연구원)
저널정보
한국유체기계학회 한국유체기계학회 논문집 한국유체기계학회 논문집 제27권 제5호(통권 제146호)
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    초록·키워드

    Understanding the unsteady flow structure of axial pumps is crucial for pump design to reduce losses and increase efficiency. This paper analyzes both the steady and unsteady flow structures in the diffuser at design and partial flow rates. The unsteady flow field in the axial pump is examined using URANS numerical analysis, and changes according to the flow rate are described based on the flow field at 70 % span. The results shows that the impeller wake, which exhibits dominant unsteady flow characteristics, mixes with the main flow during transportation, becomes deformed due to the flow structure in the diffuser, and plays a role in reducing mixing losses. This is attributed to the increase in passage blockage area at the diffuser blade pressure surface as the flow rate decreases. Therefore, a diffuser design that maximizes the effect of reducing mixing losses even at partial load points is required.

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      UCI(KEPA) : I410-151-25-02-091072515