Experimental Study of Water Hammer Pressure Intensity in a Pump-Valve System with Variative Valve Closure Times and Flow Rates

Putero, Gladion Alim (2025) Experimental Study of Water Hammer Pressure Intensity in a Pump-Valve System with Variative Valve Closure Times and Flow Rates. Undergraduate thesis, UPN Veteran Jawa Timur.

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Abstract

This research aims to analyze the water hammer phenomenon occurring in a pump-valve system with varying flow rates and valve closure times as independent variables. The water hammer phenomenon refers to a sudden pressure surge caused by an abrupt change in fluid velocity during valve closure. Experiments were conducted using a water circulating unit with three flow rate variations (38.67 L/min, 33.26 L/min, and 26.61 L/min) and three valve closure times (1 s, 1.5 s, and 2 s). The parameters measured include pressure, flow rate, and system head (static, dynamic, and effective). Theoretical analysis was performed using the Joukowsky equation and compared with empirical experimental data. The results showed that the highest water hammer pressure occurred at a flow rate of 38.67 L/min and a 1 s valve closure time with a pressure of 1.56 bar, while the lowest occurred at a flow rate of 26.61 L/min and a 2 s closure time with 0.86 bar. The results indicate that higher flow rates and faster valve closures produce greater water hammer pressures. These findings align with Joukowsky’s theory and previous studies, with an average deviation between theoretical and experimental data of approximately 5–10%. Significance between variables was obtained where the valve closing time variable had the most significant impact with a p-value of 4.36×10-7 and followed by flow rate with a p-value of 2.85×10-5. However, in addition, the effective head variable was obtained which was less significant on the intensity of water hammer pressure with a p-value of 0.1206 which was much greater than the two previous variables.

Item Type:

Thesis (Undergraduate)

Contributors:

Contribution	Contributors	NIDN/NIDK	Email
Thesis advisor	Issafira, Radissa Dzaky	NIDN0028049404	radissa.d.tm@upnjatim.ac.id
Thesis advisor	Izzah, Anisah Nurul	NUPTK7947776677230152	anisahni.ft@upnjatim.ac.id

Subjects:

T Technology > TJ Mechanical engineering and machinery

Divisions:

Faculty of Engineering > Departement of Mechanical Engineering

Depositing User:

GLADION ALIM PUTERO

Date Deposited:

04 Dec 2025 06:45

Last Modified:

04 Dec 2025 07:14

URI:

https://repository.upnjatim.ac.id/id/eprint/47738