EFFECT OF AERATOR ON HYDRAULIC DRAG ACTING ON A CHUTE  

作　　者：NIHan-gen LIXin ZHOUJing JINQiao 

机构地区：[1]StateKeyLaboratoryofCoastalandOffshoreEngineering,DalianUniversityofTechnology,Dalian116024,China

出　　处：《Journal of Hydrodynamics》2005年第1期34-42,共9页水动力学研究与进展B辑（英文版）

摘　　要：The formulae used to calculate the friction in the non uniform flow chute were examined with the experimental data, and the results show that the accuracy of the formula is enough for engineering applications. A comparison between the results of friction respectively from the uniform flow assumption and the non uniform flow approximation indicates that the former is an order of magnitude larger than the latter in the case of steep chute. The hydraulic drag on a steep chute with aerators was measured on the hydraulic model directly and the coefficient of the aerator effect on the drag was obtained. The variation patterns of the wall shear just downstream of the aerators were investigated and the mechanism of the increase in the drag by aerator were analyzed qualitatively with the measured water depths just downstream the aerators.The formulae used to calculate the friction in the non uniform flow chute were examined with the experimental data, and the results show that the accuracy of the formula is enough for engineering applications. A comparison between the results of friction respectively from the uniform flow assumption and the non uniform flow approximation indicates that the former is an order of magnitude larger than the latter in the case of steep chute. The hydraulic drag on a steep chute with aerators was measured on the hydraulic model directly and the coefficient of the aerator effect on the drag was obtained. The variation patterns of the wall shear just downstream of the aerators were investigated and the mechanism of the increase in the drag by aerator were analyzed qualitatively with the measured water depths just downstream the aerators.

关 键 词：overflow chute AERATOR wall shear hydraulic drag 

分 类 号：TV131.22[水利工程—水力学及河流动力学]