CHARACTERISTICS OF FLOW THROUGH WEIRS CONTROLLED BY A GATE WITH AN OPENING

Amany A. Habib

Abstract


Fayoum standard weirs have pipes to empty the canals. These pipes can be used to convey much water in the downstream side. When the canal is multi-purposes one (used for irrigation, navigation, power generation, domestic and industrial water supply….etc), the gate over weir will be used to control the discharge required for different purposes. An experimental study was carried out to investigate the characteristics of the flow over the weir controlled by a sluice gate and with circular opening. Five weir models with different opening dimensions were tested in a horizontal laboratory flume. The same weir height is used with each opening. Each opening is tested with four gate openings. The results of the flow over the weir with a circular opening were compared with those of the weir without an opening and the free weir (without a controlled gate). The dimensional analysis was used to correlate the discharge coefficient to the other relevant flow and opening parameters. Multiple regression equations based on dimensional analysis theory were developed for computing the discharge coefficient and the discharge of the passing through the opening and below the gate over the weir. The developed equations are compared to the experimental data and the comparison proved a good reliability and high accuracy

Refbacks

  • There are currently no refbacks.