Hydraulic Characteristics of Flow over Circular Crested Weirs

Authors

  • Rondik A. Jaafer University of Duhok
  • Bshkoj S. Hussen University of Duhok

Keywords:

Circular weir, Discharge coefficient, crest shape

Abstract

 In this investigation nine models of circular crested weir were constructed and tested during an experimental study. Crest radius( r)  of the weir was varied three times; 2.5 cm, 3.1cm and 3.75cm. For every crest radius the weir height (p) was varied three times; 15cm, 20cm and 25cm. The result was showed that the discharge coefficient (Cd) affected by two factors; head above the weir to the crest height (h/p) and head above the weir to the crest radius (h/r). It was observed that coefficient of discharge (Cd) increased with increasing (h/p) for the similar height of weir and for definite value for the ratio h/p the (Cd) value increased with increasing the crest height (p). Also it was found that coefficient of discharge (Cd) increased with increasing (h/r) for the similar crest radius and for definite value for the ratio (h/r), the (Cd) value increased with increasing the crest radius (r). A simple power experiential expression was found for the variation of (Cd) with (h/p) and (h/r) with high correlation coefficient.

Author Biographies

Rondik A. Jaafer, University of Duhok

Department of Water Recourses Engineering, College of Engineering, University of Duhok, Kurdistan region – Iraq.

Bshkoj S. Hussen, University of Duhok

Department of Water Recourses Engineering, College of Engineering, University of Duhok, Kurdistan region – Iraq.

References

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Published

2016-12-30

How to Cite

Jaafer, R. A., & Hussen, B. S. (2016). Hydraulic Characteristics of Flow over Circular Crested Weirs. Science Journal of University of Zakho, 4(2), 287–296. Retrieved from https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/404

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Science Journal of University of Zakho