Author(s): John Demetriou; Eugene Retsinis
Linked Author(s):
Keywords: Broad Crested Weir; Forces From Water Flows
Abstract: In this experimental investigation some geometrical characteristics and the prediction of the dynamic forces, from the water flow over a horizontal broad crested weir within a large circular (D) open channel, are presented, analyzed and discussed. The diameter D=const., while the lengths L of the weir and the upstream hydraulic heads h are varying. The onedimensional equations are presented and the dimensionless force, KN, from the weir and horizontal boundary shear stresses, are indirectly calculated – based on laboratory experiments. The dimensionless critical flow depths over the weir’s crest are related to dimensionless distances (Lc) from the weir’s brink, while the dimensionless downstream depth is also investigated and two relative equations are proposed. KN is related to the ratios h/L and L/D and a pertinent equation is provided. Finally, an arithmetic example is given, in order to help the hydraulic engineer when designing pertinent hydraulic structures.
Year: 2013