The Study of the Decision Criteria for the Urgency Released Valve in Hydraulic Dam

수력댐 비상방류밸브의 선정조건에 관한 연구

  • 노형운 (아이베이) ;
  • 이갑수 (한국수자원공사 에너지사업처) ;
  • 박영무 (한국수자원공사 에너지사업처) ;
  • 김범석 (한국해양대학교 기계공학과) ;
  • 이영호 (한국해양대학교 기계공학과)
  • Published : 2005.12.01

Abstract

In general, the hollow jet valve, the fixed cone valve had been used for the urgency released or maintenance of the flow rate. Nowadays, the butterfly valve, the gate valve are applied in economic performance and operation maintenance more than the hollow jet valve, the fixed cone valve. However, in the case of butterfly valve, it should be required the strict application standard to the cavitation coefficient because the structural axis and disk were situated in pipe channel and the occurring the shock problem by Karman Vortex. And, the judgment data for choice were slight lowdown in water supply and drainage facilities standard or Japanese penstock technology standard, various standard of KOWACO etc. Therefore. there were investigated the valve inside phenomenon (cavitation, disk chattering, vibration) by velocity of flow and the stability examination of body by high velocity of flow through flow scale model test using the numerical analysis and PIV to establish the applicable extensibility of the butterfly valve for the urgency released valve.

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