سه‌شنبه, 8 مهر 1399

  • ساعت : ۱۳:۰:۵۰
  • تاريخ :
     ۱۳۹۵/۱۱/۱۶ 
  • تعداد بازدید : 623
Investigating the effect of skimming wall on controlling the sediment entrance at lateral intakes
مهندس امیر مرادی نژاد
ABSTRACT
Sediment entering lateral intakes depends on flow pattern in intake entrance. Using a structure in front of intake entrance can changes this pattern and as a result the entering sediment. One of the effective methods to change pattern and manage sediment entering lateral intake is using skimming wall. By removing the sediments, in deed will not exist any sediments which a structure such as skimming wall reduces it. To guide flow into the diversion canal and increase skimming wall performance a spur dike was utilized at the opposite side of the intake channel. In this study, the
effect of skimming walls’ angle with the bank, a combination of spur dike and skimming wall and discharge changes on controlling sediments entering the intake, intake ratio and bed topography were investigated experimentally. The effect of skimming wall with three angles (10, 14, and 18
degrees) and a combination of skimming wall and spur dike on opposite side of intake were investigated. Conducting dimensional analysis, non-dimensional ratios were extracted and test variables were specified. Results showed that in the case of having a skimming wall combined with
spur dike, the amount of sediment entering the intake has decreased for 81%, 78.5% and 76% on average in walls with angle of 10, 14 and 18 degrees respectively. Combining skimming wall and spur dike has a higher effect on reducing sediments entering intake compared to skimming wall alone for about 15%
امتیاز :  ۰ |  مجموع :  ۰

برچسب ها