Revisiting frequency domain analysis method for water hammer effects on pipeline systems

被引：2

作者：

Ayed, Lazhar ^{[1
]}

Hafsi, Zahreddine ^{[1
]}

机构：

[1] Univ Sfax, Natl Engn Sch Sfax, Lab Appl Fluids Mech Proc & Environm Engn, Sfax 3038, Tunisia

来源：

JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING | 2020年 / 42卷 / 11期

关键词：

Water hammer; Impedance method; Resonance pulsations; Spectrum; LEAK DETECTION; BLOCKAGE DETECTION; PIPES;

D O I：

10.1007/s40430-020-02693-9

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper revisits frequency domain analysis method for water hammer study in a hydraulic system. Detailed investigation of the effect of the flow parameters is conducted. Weaknesses on previous research works were pointed out. A brief presentation of the frequency response function determined from motions equations of transient water flow is firstly presented. A special emphasis was devoted to the effect of frictional flow on resonance pulsations. It was obtained that, unlike previous findings, resonance frequencies in a frictional flow are decayed from odd harmonics. This decay is more or less significant depending on the friction coefficient. The observations related to various effects are also illustrated through a set of test cases that were numerically analyzed. Additionally relative uncertainties highlighting the frictional flow effect on the accuracy of resonant pulsations detection are evaluated.

引用

页数：9

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