Experimental investigation of kinetic energy and momentum correction coefficients in open channels

Abstract

In this study, vertical and lateral velocity distribution in a compound channel cross section was measured to investigate kinetic energy and momentum correction coefficients for nine different test discharges. Experiments were carried out for subcritical flow conditions and the Froude number (Fr) and depth ratio (Dr) varied between 0.87 and 0.95, and 0.17 and 0.48 respectively. Kinetic energy and mo-mentum correction coefficients, a and b were computed for each experimental test condition. Results wer Yuan SY, Xiao Ch, Li ZY, Zhu JY (2003). A study on laboratory rearing techniques for Bactrocera dorsalis (Hendal). Acta Agr. Univ. Jiangx. 25: 577-580.e compared with findings taken from the experimental work of other researchers carried out in flumes with different cross-sectional shapes. For 37 different experimental test cases, the average values of kinetic energy and momentum correction coefficients, a and b were obtained as 1.094 and 1.034 respectively. An attempt also was made to determine the relation between a and b.   Key words: Velocity distribution, kinetic energy correction coefficient, momentum correction coefficient, open channels.