Study On And Numerical Simulation The Airfoil-shaped Measuring Of Hydraulic Jump Characteristics In U-shaped Chanel

Hydraulic jump phenomenon is ubiquitous in nature and engineering applications, usuallywith a certain submergence degree and turbulent, but it also has a complicated free surface ofthe liquid. Energy dissipation plays a main role in hydraulic engineering. The importantcriteria for determining the amount of reasonable flume selection are the measuring theamount of airfoil-shaped channel irrigation region, and the amount of water equipment, aswell as the relevant parameters of the slot after the hydraulic jump. First, the hydraulic jumpresearch in China and abroad and the study on numerical simulation in hydraulic jump aresummarized the problems and deficiencies of flume in the current irrigation area by using acombination of theoretical analysis, physical model tests, numerical simulation approach, andairfoil-shaped measuring flume of U-shaped channel in hydraulic jump.The physical model tests were performed by using U-shaped channel in order to selecttwo kinds of flume epsilon at pilot water technology of channel irrigation water measurementstation in Northwest A&F University, North campus. The main results of this study are asfollows: analysis on before and after the jump of water depth, hydraulic jump length, velocitydistribution, estimate energy dissipation rate of hydraulic jump, and so on. The main resultsalso provided the empirical formula of hydraulic jump length and the relationship withhydraulic jump depth and energy dissipation rate, as well as jump before the section of theFroude number.We used Flow-3D software in order to create three-dimensional model of the differentconditions in airfoil-shaped measuring flume of U-shaped channel, to determine the flow ofhydraulic location simulation. The different conditions of flume amount, flow patterns tosimulate the calculation of hydraulic depth, velocity distribution and the comparison betweenexperimental and theoretical data were analyzed through the application of Flow-3D software.In this paper, Flow-3D software can accurately simulate the airfoil-shaped measuringflume of U-shaped hydraulic jump, characterize the characteristics of hydraulic jump andestablish the numerical model on the amount of flume description of reliability and reference.Flow-3D software calculated before and after hydraulic jump depth and hydraulic jumplength.The average relative errors of comparative theoretical data and experimental data were 2.48%,4.36and4.75%before and after hydraulic jump depth and hydraulic jump length,respectively. The software showed higher degree agreement on theoretical data andexperimental data, meet the numerical simulation, but also proved the other hand, airfoil-shaped measuring flume has a very high flow measurement accuracy.We used Flow-3D software in order to investigate the impact of epsilon bottom slope inairfoil-shaped measuring flume contraction of U-shaped channel, to establish a numericalsimulation program, U-shaped channel bottom slope in the different numerical experimentsand to select the bottom of20cm arc radius and the bottom of30cm arc radius.This paper provides hydraulic jump theory, model tests and numerical simulation analysisbased on the hydraulic jump parameters. Previous researches also provided the results of thehydraulic jump, the hydraulic jump problems and the airfoil-shaped measuring flume in U-shaped channel of the irrigation area on the plain application in certain engineering andtechnical references.