明渠自掺气水流发展区掺气浓度分布试验

Test of aeration concentration distribution in aerated water developed area of open channel

本文对不同坡度、水深和流速的明渠掺气水流的掺气浓度进行了测量。通过对试验数据分析,发现掺气发展区断面掺气浓度分布曲线与均匀掺气区的差异在于前者下支浓度梯度很小。本文拟合了该无因次水深与佛汝德数的经验计算式,与试验数据吻合良好。

The paper surveys the aeration density of aerated water in open channel under the condition of different slope, water depth, flow velocity. According toanalysis of experimental data, the cause of the difference between the aeration density distribution curve in aerated water developed area and the uniform aeration area is the small gradient of density for the former. The paper fits the dimensionless water depth and the experimental calculation formula of Froude number, it tallies with the experimental data.