串联管道串联阀芯受瞬变压力研究

发布时间：2018-03-21 08:12

本文选题：停输再启动　切入点：串联管道　出处：《应用力学学报》2016年05期 　论文类型：期刊论文

【摘要】：结合成品油停输再启动特性,建立了成品油控制体运动方程、连续方程,提出了串联阀芯流阻系数模型。通过差分方法对其编程求解,以串联管道串联阀芯为例,得出了串联阀芯受瞬变压力变化规律,探讨了停输再启动输油管路瞬变压力震荡衰减问题。以一个具体的工程实例进行研究,结果表明:串联管道串联阀芯线性关闭较单阀门线性关闭产生的最大瞬变压力由5.6MPa减至4.3MPa,减少了30.23%;管路瞬变压力震荡过程中,随着流体可压缩性的增大,流体的振幅衰减加剧,在43.2s时间内,瞬变压力最大峰值由4.85MPa减至1.28MPa;双阀门停输再启动中延长任一个阀门启闭时间均可使最大瞬变压力减小;对于相同关阀计划,阀芯流量系数越平缓,阀芯受瞬变压力越小。
[Abstract]:Combined with the characteristics of finished oil shutdown and restarting, the equations of motion and continuity of finished oil controllers are established, and the model of flow resistance coefficient of series valve core is proposed. The method of difference is used to solve the problem, and the series pipe in series is taken as an example. The variation law of transient pressure on the series valve core is obtained, and the problem of attenuation of transient pressure oscillation in the pipeline is discussed. A concrete engineering example is used to study the problem. The results show that the maximum transient pressure caused by the linear closure of the series pipe spool is reduced from 5.6 MPA to 4.3 MPA, which decreases 30.23.The amplitude attenuation of the fluid increases with the increase of the compressibility of the fluid during the transient pressure oscillation of the pipeline. In 43.2 s, the maximum transient pressure peak value is reduced from 4.85 MPA to 1.28 MPA; the maximum transient pressure can be reduced by prolonging the opening and closing time of any valve during the shutdown and restarting of double valves; for the same valve closing plan, the flattener the flow coefficient of the valve core is, The smaller the valve core is subjected to transient pressure.
【作者单位】：长江大学石油工程学院;油气藏地质及开发工程国家重点实验室;中石化西南工程有限公司钻井工程研究院;
【基金】：中国博士后科学基金第57批面上项目(2015M572495) 长江青年基金(2015cqn70)
【分类号】：O302

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