曲面底扩散陡槽急流问题的特征线解法

Characteristic Method of Super-critical Flow In Divergent Chute with Curved Bed

针对曲面底扩散陡槽内急流特点采用沿水深的积分方法,并考虑曲率、底坡及底摩擦对流动的影响,将三维水流运动方程组简化为二维水深平均流方程,并导出了水深平均流的特征方程组;结合抛物柱面底扩散陡槽工程实例采用特征差分法进行数值计算,通过逐时段内插,调整计算点分布可克服特征线方法计算点分布不规则的缺点,使计算结果便于实用.

Depth-mean-flow equations have been derived,through 2-D mean simplification of integration for 3-D folw equations along depth,for super-critical flow in divergent chute with curved bed,in which the influence of curvature,bed slope and bottom friction on flow are considered.Based on depth-mean-flow equations,characteristic equation system are presented.Numerical characteristic FDM solution has been given for a divergent chute with parabolic prismatic bed surface in engineering.Problems for irregular distribu...