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1 Journal of Theoretical and Applied Mechanics

1 2020

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Vibration transients of reservoir-pipe-valve system caused by water hammer

Miao Yang, Jiang Yuncheng, Qiu Zaihui, Pan Jun, Wang Lu, Han Zhenrong, Li Kun, Zhang Li, Zhang Xiaolu

Journal of Theoretical and Applied Mechanics

2020

Vol. 58 nr 4

1037--1048

A severe oscillation, accompanied with an abnormal “click” sound, of a fuel feeding pipe system during valve closing, when the feeding flowrate reaches a certain value, is observed experimentally. A fluctuation model in which stiffness and damping coefficients of the vibration system are time varying is proposed. Each coefficient is composed of two parts, one of which is constant and the other is time varying. Based on this model, simulation transients of the vibration displacement, velocity and pressure in the pipe are presented. Simulations of the pressure transients are compared with experimental data detected by pressure transducer, which shows that both have fluctuations in the transient process at a large flowrate.