시스템내 발생하는 캐비테이션 저감방법에 관한 연구 = Study on the Reduction Method of Occurred Cavitation in a System

다국어 초록 (Multilingual Abstract)

Two phenomena often encountered in liquid flow, which were completely absent in gas or vapor flow, were cavitation and flashing. These phenomena were of significant interest in any comprehensive discussion of control valves or contracted devices since their occurrence would affect the device sizing procedures, might introduce noise and vibration, and also may limit the life expectancy of device components and the immediate downstream piping. Thus, this study aimed to find the reduction method of occurred cavitation in system by the computer simulation. A derivative six model with different dimensions of cavity were adopted. From the results, it was found that the length of the cavity was more important factor to reduce the pressure drop over the control valves or contracted devices than the depth of the cavity. And the pressures along the centerline of the contracted devices were dropped two times in the case of having the large length (Lc=1.5D) of cavity.

참고문헌 (Reference)

1 "고주파 유압시스템의 주파수 특성과 축압기 효과의 실험적 연구" 6 (6): 51-57, 2003

2 "Pump and System Troubleshooting Handbook" Pump and System 3-11, 1999

3 "Fluid Kinematic Energy as a Selection Criteria for Control Valves" 22-26, 1997

4 "Fluid Flow Handbook" McGraw-Hill 20-21, 2002

5 "CFX 4.4 User Manual" AEA Technology 2000