Home Articles List Article Information
Iranian Journal of Science and Technology Transactions of Civil Engineering
Journal Archive
Volume Volume 39 (2015)
Volume Volume 38 (2014)
Volume Volume 37 (2013)
Volume Volume 36 (2012)
Volume Volume 35 (2011)
Volume Volume 34 (2010)
Volume Volume 33 (2009)
Volume Volume 32 (2008)
Volume Volume 31 (2007)
Volume Volume 30 (2006)
Volume Volume 29 (2005)
Volume Volume 28 (2004)
Volume Volume 25 (2001)
(2008). Characteristics of subcritical flow over vertical drops with sloping aprons. Iranian Journal of Science and Technology Transactions of Civil Engineering, 32(5), 531-542. doi: 10.22099/ijstc.2008.729
. "Characteristics of subcritical flow over vertical drops with sloping aprons". Iranian Journal of Science and Technology Transactions of Civil Engineering, 32, 5, 2008, 531-542. doi: 10.22099/ijstc.2008.729
(2008). 'Characteristics of subcritical flow over vertical drops with sloping aprons', Iranian Journal of Science and Technology Transactions of Civil Engineering, 32(5), pp. 531-542. doi: 10.22099/ijstc.2008.729
Characteristics of subcritical flow over vertical drops with sloping aprons. Iranian Journal of Science and Technology Transactions of Civil Engineering, 2008; 32(5): 531-542. doi: 10.22099/ijstc.2008.729

Characteristics of subcritical flow over vertical drops with sloping aprons

Editorial, Volume 32, Issue 5, Winter 2008, Page 531-542  XML PDF (299 K)
DOI: 10.22099/ijstc.2008.729
Abstract
In this investigation, characteristics of vertical drops with subcritical flow at the upstream channel and sloping aprons at the downstream channel have been studied experimentally.  Flow characteristics such as pool depth, downstream depth, and energy loss have been measured.  Two physical models of 0.41 and 0.21 m height were built and the inverse slope was set at 5°, 10° and 15° degrees. Experimental data were compared with the previous investigators’ results for horizontal downstream channels.  A method is presented to estimate flow characteristics.  It was shown that the values of the relative pool depth for sloping aprons are larger than those with a horizontal downstream channel.  It was found that the values of the relative downstream depth for sloping aprons are slightly larger than those with a horizontal downstream channel. Experimental results show that the relative energy loss increases by increasing the angle of the invert and the maximum increase is for the 5° degree slope. Predictions for the pool and downstream depths agree with the experimental data, but the differences between the predictions and the experimental results of the relative energy loss are significant.        
 
Keywords
Hydraulic structures; subcritical flow; Drop; sloping apron
Statistics
Article View: 1,552
PDF Download: 1,063