International Journal of Air-Conditioning and Refrigeration

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Numerical Study on the Reduction of Water Hammering in a Simple Water Supply Pipe System

  • Lim, Ki-Won (Fluid Flow Research Group, Korea Research Institute of Standards and Science) ;
  • Cha, Dong-Jin (Division of Control and Instrumentation and Building Service Engineering, Hanbat National University)
  • Published : 2001.06.01
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Abstract

A numerical study has been conducted to characterize the transient pressure in a simple water supply pipe system with an air chamber by utilizing a commercial code that employs the method of characteristics. Some results produced for validation in the study agree quite well with the previously reported. Several parameters are than varied. Among them are the valve closure time, the wave speed, the static pressure, the polytropic exponent, the air chamber volume, the diameter and the shape of orifice in the air chamber, etc, while the water temperature and velocity are kept constant at $20^\circ{C}$ and 0.8m/s, respectively. Results reported in this parametric study may be useful to understand the unsteady behavior of the system.

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