Irrigation Sciences and Engineering

Irrigation Sciences and Engineering

Experimental Study of Scouring Pattern Due to Orifice Submerged Jets

Document Type : Research Paper

Authors
Abstract
In this article, downstream scour patterns were investigated for submerged jets with different diameters and shapes (circular, rectangle, diamond and square) for single jets and also effects of different angles of crossing compound jets. For this aim, all effective parameters of submerged jets behavior were studied and the effective dimensionless relationships were derived according to dimensional analysis. In order to analyze this relationship, a physical model was built in KWPA laboratory and tests were run with different discharges. Then dimensions of scour patterns were measured in downstream of jets. The results indicated that the best development in pattern of scour belongs to diamond jet with average of 22% increasing in comparison by rectangle jet and the minimum of outer diameter with average of 183% increasing in comparison by the maximum one, also threefold increasing of crossing jets angles cause 58% increasing in the parameters of scour.
Keywords

Volume 39, Issue 3
Autumn 2016
Pages 173-185

  • Receive Date 09 July 2015
  • Revise Date 25 October 2015
  • Accept Date 24 October 2016
  • Publish Date 22 October 2016