Effect of Angle of Impact on Dynamic Pressure of the Flip Bucket Jets

Document Type : Research Paper


1 Professor, Shahid Chamran University, Ahwaz, Iran. HTUH

2 MSc. in Water Structures, Shahid Chamran University of Ahwaz, Iran.

3 Ph.D. Student, in Water Structure, Shahid Chamran University of Ahwaz, Iran.

4 MSc. Student, in Water Structures, Shahid Chamran University of Ahwaz, Iran.


     In this study, dynamic pressures due to impact of a ski jump out of a flip bucket downstream of a chute spillway model have been studied. Experiments were performed for five discharge (0.11, 0.18, 0.25, 0.32, 0.39 mP3P/s per unit width) and four jet impact angles (0P0P, 30P0P, 60P0P, 90P0P). Fluctuation of dynamic pressure was measured using a 250 mbar pressure transducer. Discharge (q), horizontal and vertical distance from the peak to jet impact location (L, H-h) and angle impact in downstream (θ) were considered as the main parameters affecting the dynamic pressure. Results showed that pressure coefficient is highly sensitive to horizontal and vertical distances to impact location as well as to the impact angle. Using dimensionless parameters, a power function was correlated for calculation of the dynamic pressure for variable impact angle.


  • Receive Date: 26 September 2010
  • Revise Date: 30 September 2014
  • Accept Date: 25 June 2011
  • First Publish Date: 22 May 2013