Study on Water Hammer Effect in Turbulent Flow through the Pipe System

Mohamad Nor Musa; Syahrullail Samion; Mohd Kameil Abdul Hamid; Wan Mohamad Aiman Wan Yahya; Eriza Paiman

Authors

Mohamad Nor Musa School of Mechanical Engineering, Faculty of Engineering,Universiti TeknologiMalaysia, 81310 UTM Skudai,Johor, Malaysia
Syahrullail Samion School of Mechanical Engineering, Faculty of Engineering,Universiti TeknologiMalaysia, 81310 UTM Skudai,Johor, Malaysia
Mohd Kameil Abdul Hamid School of Mechanical Engineering, Faculty of Engineering,Universiti TeknologiMalaysia, 81310 UTM Skudai,Johor, Malaysia
Wan Mohamad Aiman Wan Yahya School of Mechanical Engineering, Faculty of Engineering,Universiti TeknologiMalaysia, 81310 UTM Skudai,Johor, Malaysia
Eriza Paiman School of Mechanical Engineering, Faculty of Engineering,Universiti TeknologiMalaysia, 81310 UTM Skudai,Johor, Malaysia

Keywords:

Water hammer effect, turbulent flow, pipe system

Abstract

The purpose of this research is to study water hammer effect in turbulent flow through the pipe system. The water hammer occurs when the water flow in the pipeline is suddenly stopped by the valve. Water hammer can cause the pipe to break if the pressure is high enough. An experimental method has been conducted to investigate the effect of design parameters such as difference kind of material properties of pipes and the effect of the flow rate of fluid on the frequency (Hz) and the maximum acceleration of vibration signal (m/s²) during water hammer effect, the vibration signal is captured by using the DEWE-41-T-DSA signal analysis and piezoelectric accelerometer sensor. Data signal is transferred to DEWESoft software to be analyzed using the Fast Fourier Transform (FFT) method. We found that the maximum acceleration vibration signal will increase the flow rate of fluid increase. Besides, the maximum acceleration vibration signal of UPVC pipe is higher than HDPE pipe. Meanwhile, for the frequency, the experimental result shows that the larger frequency is the UPVC pipe compare with the HDPE pipe. This is due to the compressibility of fluid and elasticity of the pipe. Therefore, it can be concluded that the UPVC pipe deal with more water hammer effect compares to the HDPE pipe due to the mechanical properties difference of UPVC and HDPE pipe.