Energy dissipation of a circular jet discharged vertically downward

AuthorPawit Wacharamanee
Call NumberAIT Thesis no. 175
Subject(s)Hydraulic jump
Jets--Fluid dynamics
NoteA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in the SEATO Graduate Schoolof Engineering, Bangkok, Thailand
PublisherAsian Institute of Technology
AbstractA method of dissipating kinetic energy of a circular jet issued vertically downward had been investigated. The technique consisted of impinging the jet directly on a smooth horizontal surface. As a result a part of the energy would be absorbed by the surface due to impact. The remaining kinetic energy resulted in a radial flow at a supercritical state. Further dissipation of the energy of flow was achieved by creating a hydraulic jump. Circular weirs of 4 ft.in diameter and different heights were used to control tail water depth. Theoretical analysis of the circular hydraulic jump was made by applying continuity and momentum equations. The energy losses of the jet and the circular hydraulic jump were investigated. Dimensional analysis was also made to determine functional relationship between some significant dimensionless parameters of the variables involved such as the Froude Number of flow before the jump, the ratio of positions of the jump, and the ratio of depths of flow. Sharp-edged orifices of 2, 2-^, 3 and 4-in. diameters and three sizes of circular weir of 1 and 1^-in. heights were used in the experiment. The tests were performed with the discharge ranging from 0,0370 to 0.4630 cfs
Year1967
TypeSpecial Study Report (SSR)
SchoolStudent Research Before 1980
DepartmentOther Field of Studies (No Department)
Academic Program/FoSThesis (Year <=1979)
Chairperson(s)Pichai Boonyakanjana
Examination Committee(s)Schulz, Edmund F. ;Niwat Daranandana
DegreeThesis (M. Eng.) - SEATO Graduate School of Engineering, 1967


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