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| An improved MOC and impact analysis of overload on water hammer |
| Received:September 27, 2019 Revised:January 14, 2020 |
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| DOI：10.7511/jslx20190927001 |
| KeyWord:pipeline an improved MOC overload water hammer |
| Author | Institution |
| 马康 |
西安交通大学 航天航空学院 机械结构强度与振动国家重点实验室, 西安 |
| 顾振杰 |
西安交通大学 航天航空学院 机械结构强度与振动国家重点实验室, 西安 |
| 白长青 |
西安交通大学 航天航空学院 机械结构强度与振动国家重点实验室, 西安 ;陕西省先进飞行器服役环境与控制重点实验室, 西安 |
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| Abstract: |
| The traditional MOC is limited in the analysis of water hammer under overload, which cannot provide the reliable guidance for water hammer protection.Considering the overload effect and dynamic friction, an improved MOC that can accurately simulate the maximum pressure and wave attenuation of water hammer is proposed in this paper.The water hammer under overload is investigated, and the method was also verified by comparing the analysis data with CFD and experimental results.It is found that the pressure at the valve position rises with the increase of overload, and the influence of axial overload on water hammer is greater than that of lateral overload.The effect of instantaneous overload is significant on maximum pressure, but little on wave propagation and attenuation as valve closing.Moreover, the influence of parameters such as valve closing characteristics and fluid density on water hammer under overload was analyzed. |
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