Mohsen Soleimani Babarsad ¹, Habib Musavi Jahromi ², Heydarali Kashkooli ¹, Hossein Mohammad Vali Samani ², Hossein Sedghi ³

Affiliations
1 Department of Irrigation Eng, Science and Research Branch, Islamic Azad University, Khuzestan, IR
2 Department of Water Science engineering, Shahid Chamran University, Ahwaz, IR
3 Department of Irrigation Eng, Science and Research Branch, Islamic Azad University, Tehran, IR

Abstract

Behavior of turbulent jet is relying on jet parameters, environmental and geometric parameters. In this research, it has attempt to study effect of jet parameters of internal angle on maximum effective length and velocity on centerline from nozzle experimentally. Toward this end, four internal angles 30, 45, 60 and 90-degree are considered for this study, and twelve tests conducted in a flume of 600 cm as long, 100 cm as high and 150 cm in width. Various discharges were used to evaluate effective length for a wide range of densimetric Froude numbers F₀, from 17.9 to 39.4 that is defined at the nozzle. The relative X/d₀ and U_m/U₀ were plotted against the densimetric Froude number for each nozzle. As a result, it is revealed that both velocity on centerline and effective length decreases when nozzle angle decreased from 90° to 30°. The results show that, for all range of Fr₀ the U_m/U₀ ratio for nozzle with a=90° on centerline increases 20 - 27% than nozzle with α=30° that has lowest velocity on centerline than other nozzle.

Keywords

Jet, Nozzle Angle, Effective Length, Flume, Densimetric Froude Number

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