Characteristics of pressure distribution along perforated drain-pipe in siphon well
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Abstract:
Intakes of nuclear power plant in high-latitude coastal regions generally have ice problems that will affect their normal operation. One solution is to transport warm water to the forebay of pump stations through perforated drain-pipes. This method can raise water temperature and prevent ice jam. A physical model of perforated drain-pipe was used to study its hydraulic characteristics, including pressure distribution and velocity distribution. A non-dimensional formula of pressure distribution within the perforated drain-pipe was proposed and the maximum average error was 0.88%. The study shows that the pressure recovery within the perforated drain-pipe is caused by transformation from velocity to pressure. The larger the velocity, the more obvious the pressure recovery. The pressure of the downstream drain-pipe is larger than that of the upstream because the streamline is skewed near the outlet. The study results can provide references for the design and application of perforated drain-pipes.
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