Research on Influencing Factor of Gate Opening Outflow of Reservoir Discharge Tunnel
The chronergy of the flow coefficient of free orifice flow and the influence of upstream water level on outflow are evaluated for a reservoir discharge tunnel.By analyzing 144 flow measurement data in recent 11 years,it is found that the systematic error of 127 flow measurement data is less than 5%,accounting for 88.2%,which verifies the effectiveness of the original calibration results.The research shows that the increase of gate opening will lead to the increase of outlet flow,but the increase amplitude will gradually decrease.There is a difference between the expected opening input by the intelligent gate controller and the actual opening,which will affect the accurate control of the flow,especially under the condition of small flow.
reservoir discharge tunnelgate openingflow coefficientupstream water levelflow control
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万方数据
