A Two Variable Experimental Study in Rectangular Open Channels of Smooth Boundaries
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 6
Abstract
In this experimental study a two variable investigation of pertinent velocity laboratory measurements is presented, analyzed and discussed. The research deals with the uniform-steady-turbulent water flows within an almost horizontal, smooth, rectangular open channel. The local (point) velocities were electronically measured in two long channels with low and medium-low aspect ratios (groups A, B), and a third channel with high aspect ratios (group C). The hydraulic centre’s (H.C.) position on the vertical axis of symmetry is examined, after measuring a very large number of local velocities. A number of velocity diagrams in Y=y/0.5·b and Z=z/zn (cross sections b·zn, y, z, axes) coordinates are also presented. A diagram of vertical strips within all water cross sections is created, and the internal distribution of partial discharges is examined in dimensionless terms. All dimensionless velocities are considered as two variable functions of Y and Z, =f(Y, Z), and all data are elaborated with the aid of a computer program, giving a number of computer isovelocity lines, =const. A number of equations are also proposed in order to better examine the flows’ structures, aiming on helping the hydraulic engineer when analyzing the mechanism of flow.
Authors and Affiliations
John Demetriou
Keywords
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