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PIV에 의한 상수도 배관용 틸팅디스크 체크 밸브의 손실저감에 관한 연구
김범석(B.-S. Kim),김정환(J.-H. Kim),이중열(J.-Y. Lee),김진구(J.-G. Kim),이영호(Y.-H. Lee) 한국유체기계학회 2003 유체기계 연구개발 발표회 논문집 Vol.- No.-
In generally, under the influence of over-pressure drop, serious problems such as cavitation, choked flow, flashing and vibration has been coming around the tilting disk check valve. A PIV experiment to examine the cause of energy loss has been performed and the improvement configuration of valve seat based on this visualization results is proposed. In the visualization results, flows in the piping system became instability under the influence of the shape of boss. This unstable flows induces sudden pressure drop in the piping system. So, we change the configuration of boss as a streamlined design to be stabilized the flows. A pressure measurement has been performed to know that the influence of the configuration change. In result, the rate of pressure loss reduction is about 22% at the position of No. 2 and 24.2% at the position of No. 6 in comparison with pre-improved shape.