Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)
- Volume 12 Issue 5
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- Pages.984-991
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- 1988
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- 1225-5963(pISSN)
DOI QR Code
A Study on Fluid Thansient Accommpanying Cilumn Separation in Oil Hydraulic Pipeline -Investigation on Two-Step Pressure Rise
유압 관로계에서 액주분리를 수반하는 유체과도현상에 관한 연구 -2단입력 상승현상에 관하여-
Abstract
Liquid column separation occurs when the valve on the pipeline is closed rapidly in an oil hydraulic system. In this case two-step pressure rise is sometimes observed in a comparatively short pipeline. In this study the two-step pressure rise phenomenon was investigated experimentally and theoretically. The experiments showed that maximum pressure values during two-step pressure rise might exceed extremely the values computed by the theory of rigid-liquid-column separation. So the two-step pressure rise phenomenon appears one of important factors of pipe strength design. From the theoretical considerations based on the experimental and numerical results, the mechanism of two-step pressure rise phenomenon could be explained clearly.
본 연구에서는 유압관로에서 액주분리를 수반하는 유체 과도현상의 압력파형 에 때때로 관측되는 2단적 압력상승현상의 발생기구를 실험 및 이론적인 추론, 특성곡 선법을 사용한 수치해석을 통하여 명확히 구명함을 목적으로 한다.
Keywords
- fluid transient;
- liquid column separation;
- two-step pressure rise phenomenon;
- characteristics;
- rigid liquid column theory