S
Need to calculate flow in a long open channel.
One Venturi is installed at the entrance and three Dall Orifices are installed at the exit.
Variations in readings are large.
A 22 km channel, 20 m wide, 4.5 m deep, with a trapezoidal profile is used to convey water from a dam to a large water purification plant.
Operating flow range: 2000 to 3000 Ml/day
Need to re calculate the Venturi and the Dall Orifices. Current reading ariations amongst these equipment is +/- 7%.
A) Does anybody has data on Dall Orifice calculations, installation? and accuracies?
b) Any idea how to measure the flow in the canal
by other improved means?
Thanks
Sam
One Venturi is installed at the entrance and three Dall Orifices are installed at the exit.
Variations in readings are large.
A 22 km channel, 20 m wide, 4.5 m deep, with a trapezoidal profile is used to convey water from a dam to a large water purification plant.
Operating flow range: 2000 to 3000 Ml/day
Need to re calculate the Venturi and the Dall Orifices. Current reading ariations amongst these equipment is +/- 7%.
A) Does anybody has data on Dall Orifice calculations, installation? and accuracies?
b) Any idea how to measure the flow in the canal
by other improved means?
Thanks
Sam