坡面薄层水流流态判定方法的初步探讨

Preliminary study on flow pattern determinant method of shallow flow on slope surface

为了研究坡面薄层水流流态的判定方法，从水力学与泥沙动力学观点出发，在4种不同坡度有机玻璃床面与人工粗糙床面（砂粒粒径为0．5～1mm）上对坡面薄层水流进行了试验研究，并应用水力学二元流雷诺数与泥沙动力学绕流雷诺数对坡面薄层水流流态进行了分析比较，研究结果表明绕流雷诺数能较好反映坡面薄层水流流态。

In order to research the flow pattern determinant method of shallow flow on slope surface, from the view point of hydraulics and sediment transport mechanics, a series of experiment of shallow flow on slope surface were performed on organic glass slippery bed and artificial rough bed （grain size of sediment is from 0. 5 mm to 1 mm） with four kinds of gradient. And the flow pattern of shallow flow on slope surface under above conditions was analyzed and compared by applying hydraulics binary fluid Reynolds number and sediment transport mechanics turbulent flow Reynolds number. The results show that turbulent flow Reynolds number can better reflect flow pattern of shallow flow on slope surface.