نوع مقاله : مقاله پژوهشی
1 دانشجوی دکترای علوم و مهندسی آب دانشگاه شیراز
2 گروه مهندسی آب، دانشکده کشاورزی، دانشگاه شهرکرد
3 دانشیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه شهرکرد
4 آبیاری و زهکشی، گروه مهندسی آب دانشگاه شهرکرد
عنوان مقاله [English]
In the present research, the hydraulic jump characteristics were studied experimentally over five triangular corrugated beds at the Hydraulics Laboratory of the Department of Water Engineering, University of Shahrekord, Iran. The flume has the dimensions of 0.4 m wide, 0.4 m deep and 12 m long. A total number of 15 tests were carried out for the range of initial Froude number from 6.1 to 13.1. In all tests, effect of triangular corrugated bed on velocity profiles and energy dissipation were studied. The dimensionless hydraulic parameters were determined as a function of the Froude number. The analysis of velocity profiles at different sections of the jump showed that the velocity profiles were similar and different from the profile of the simple plane wall jet. The normalized boundary layer thickness δ/b was equal to 0.39 for jumps on corrugated bed compared to 0.16 for the simple wall jet. It was also found that for similar Froude number the energy loss of jump on corrugated bed is more than the smooth bed (average=11.3%).
Hydraulic jump, Triangular corrugated beds, Velocity profiles, Energy loss.