流体输送系统非稳态过程模拟及水锤防患措施

发布时间：2018-05-05 13:15

本文选题：水锤 + 数解综合法　；参考：《浙江大学》2015年硕士论文

【摘要】：当满足适当条件下的稳态流体受到水锤诱因,将会触发一种瞬态流动现象-----水锤。此时流体运动中所有的空间点处的一切运动要素不仅随空间位置而变,而且随时间剧烈变化。长久以来使水利水电、石油化工、核电等行业饱受水锤的困扰并蒙受巨大的经济损失和人员伤亡事故教训,因此需要找到对非稳态流体的物理性质和微观机理研究的方法并应用在工程实践中,以制定有针对性的水锤防患措施。本文以连接某地下水封洞库的各段原油长输管线为研究对象,结合数解综合法公式估算的快捷性和AFT impulse软件计算的精确性。首先用经验数据代入公式快速估算出水锤的最大压升,并利用工程经验快速辨识和筛选可能发生较严重水锤事故的管线,然后利用水锤软件进行精确模拟和计算。经对比,估算值与软件计算值基本吻合。所总结的一套非稳态流体模拟和计算的综合方法已成功在工程实际中得以应用。根据计算所设置的水击泄压阀可以在不提高管道设计压力的情况下,对管道系统进行泄压保护,其与SCADA系统组成了长输管线主要的水锤防患措施。
[Abstract]:When the steady state fluid is induced by water hammer under suitable conditions, it will trigger a transient flow phenomenon-water hammer. At this time, all the moving elements at all the spatial points in the fluid motion change not only with the space position, but also with the time. For a long time, water conservancy, hydropower, petrochemical, nuclear power and other industries have been plagued by water hammer and suffered huge economic losses and casualties. Therefore, it is necessary to find a method to study the physical properties and microscopic mechanism of unsteady fluid and to apply it to engineering practice in order to formulate targeted water hammer prevention measures. In this paper, the long distance crude oil pipeline connecting a underground water seal reservoir is taken as the research object, the rapidity of the estimation by the method of numerical solution synthesis and the accuracy of the calculation by AFT impulse software are studied in this paper. Firstly, the maximum pressure rise of water hammer is estimated quickly by inserting empirical data into the formula, and the pipeline that may occur serious water hammer accident is quickly identified and screened by engineering experience, and then the accurate simulation and calculation are carried out by using water hammer software. By comparison, the estimated value is basically consistent with the calculated value of the software. A set of synthetic methods for simulation and calculation of unsteady fluid have been successfully applied in engineering practice. According to the calculation, the pressure relief valve of water hammer can be used to protect the pipeline system without increasing the design pressure of the pipeline. It and SCADA system constitute the main water hammer prevention measures for the long distance pipeline.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ022.1

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