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Paper Information

Journal:   WATERSHED ENGINEERING AND MANAGEMENT   2019 , Volume 11 , Number 1 ; Page(s) 220 To 232.
 
Paper: 

Investigation dimensions of separation zone at lateral intake and flow pattern in a U channel bend with presence sill, dike and skimming wall

 
 
Author(s):  Goleij Hassan, Haghiabi Amirhamze, SANEIE Mojtaba, Yonesi Hojattallah*
 
* Faculty of Agriculture, University of Lorestan, Iran
 
Abstract: 
The main goal of hydraulic engineers is to design a water intake to deliver the maximum flow discharge with the minimum sediment entry. Dimensions of the eddy zone in lateral channel, three dimensional flow pattern, sedimentation, and sediment entry are the major parameters that must be considered at lateral intakes. In this study, , the effect of Froude number on sediment inclusion into the intake, determination of separation zone in lateral channel and the width of separation line of flow in front of the intake using three structures of sill, 10 skimming wall and dike in three flow percentages of 17, 21 and 26 were investigated by experimental investigation. The percentage of flow diversion is the major cause of the formation of dimensions of separation zone such that with increasing the percentage of flow diversion, width and length of the separation zone decreased in the basic and sill experiments. However, by adding a 10 skimming wall, the changing trend is different. At low percentage of flow diversion, dimensions of the eddy area decreased significantly and it increased with increasing the percentage of flow diversion. However, in general, the simultaneous usage of a 10 skimming wall and sill structures, dimensions of separation zone in lateral intake decreased and the useful width of outlet flow at lateral intake increased and the separation zone and sediment accumulation at the entrance of lateral channel decreased compared to basic and sill experiments. By investigating the width of separation line of flow in the surface and near the bed of channel bend, it was found that the flow diversion rate was the most important factor affecting this hydraulic parameter; since, at surface level of flow with increasing flow diversion ratio, this parameter increases and due to the creation of secondary flow and the change of surface flow pattern under the influence of the simultaneous application of a 10 skimming wall and dike structures, this parameter increases more. However, near the bed, in basic and sill experiments, this parameter increases with increasing flow diversion rate. However, the simultaneous application of 10 skimming wall and sill structures, the width of separation line of flow near the bed reduces by increasing the diverted flow and, by adding dike structure to the 10 skimming wall and sill in front of the intake, the width of flow separation line decreases more.
 
Keyword(s): Channel bend,Froude number,Lateral intake,Maximum flow discharge,Separation zone
 
 
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APA: Copy

Goleij, H., & Haghiabi, A., & SANEIE, M., & Yonesi, H. (2019). Investigation dimensions of separation zone at lateral intake and flow pattern in a U channel bend with presence sill, dike and skimming wall. WATERSHED ENGINEERING AND MANAGEMENT, 11(1 ), 220-232. https://www.sid.ir/en/journal/ViewPaper.aspx?id=663824



Vancouver: Copy

Goleij Hassan, Haghiabi Amirhamze, SANEIE MOJTABA, Yonesi Hojattallah. Investigation dimensions of separation zone at lateral intake and flow pattern in a U channel bend with presence sill, dike and skimming wall. WATERSHED ENGINEERING AND MANAGEMENT. 2019 [cited 2021May11];11(1 ):220-232. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=663824



IEEE: Copy

Goleij, H., Haghiabi, A., SANEIE, M., Yonesi, H., 2019. Investigation dimensions of separation zone at lateral intake and flow pattern in a U channel bend with presence sill, dike and skimming wall. WATERSHED ENGINEERING AND MANAGEMENT, [online] 11(1 ), pp.220-232. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=663824.



 
 
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