基于自由振荡理论的有压管道堵塞检测方法

发布时间：2018-05-12 13:53

本文选题：管道堵塞 + 瞬变流　；参考：《哈尔滨工业大学学报》2014年08期

【摘要】：为了解决有压管道的堵塞问题,根据自由振荡理论的基本原理,提出适于检测管道堵塞的数值模拟简化模型,得出了确定管道堵塞的定位与定量的方法.基于有压瞬变流理论,结合振动理论,引入迪拉克函数,建立包含堵塞的管道瞬变流控制方程;对方程进行无量纲化并线性化,使其得到简化.在固定边界条件下,求出相对压力的解析解,对其进行傅立叶级数分析,得到各谐波在各相对周期中的振幅,由此可计算出各谐波的衰减指数.求解结果表明:堵塞衰减与管道流量成正比,管道堵塞的相对位置与堵塞衰减参数呈余弦关系,只要已知两个谐波的堵塞衰减参数即可确定堵塞位置和堵塞量级.
[Abstract]:In order to solve the blockage problem of pressurized pipeline, according to the basic principle of free oscillation theory, a simplified numerical simulation model suitable for detecting pipeline blockage is put forward, and a method to determine the location and quantity of pipeline blockage is obtained. Based on the theory of pressurized transient flow and vibration theory, Dirac function is introduced to establish the governing equation of pipeline transient flow including blockage, and the equation is dimensionless and linearized to simplify the equation. Under the fixed boundary condition, the analytical solution of relative pressure is obtained, and the amplitude of each harmonic in each relative period is obtained by Fourier series analysis, and the attenuation exponent of each harmonic can be calculated. The results show that the blockage attenuation is proportional to the pipe flow rate, and the relative position of the blockage is cosine with the blockage attenuation parameter. The clogging position and the clogging order can be determined only if the two harmonic attenuation parameters are known.
【作者单位】：哈尔滨工业大学城市水资源与水环境国家重点实验室;哈尔滨工业大学市政环境工程学院;哈尔滨商业大学能源与建筑工程学院;广东省电力设计研究院;
【基金】：国家自然科学基金资助项目(51208160) 黑龙江省自然科学基金资助项目(QC2012C056)
【分类号】：U178

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