矩形分流墩墩体壁压特性及其空化研究

通过系统的模型试验研究了中，低佛氏数下急流越过矩形分流墩，墩后通大气的情况下，墩体壁压及其空化可能性，得到了墩顶挑射流态下，墩上游和墩体壁压分布规律；分析了墩体阻力系数与相对墩高，收缩比及控制断面佛氏数的分布规律。试验结果证明，当墩后充分供气时，墩体产生空蚀的可能性极小。

The Behaviors of Pier-Wall Pressure and Its Cavitation Produced by Supercritical Flow Over the Rectangular Flow-Spliting Dissipator

Systemmatic model tests were conducted to study the behaviors of the pier--wall pressure and its cavitution caused by supercritical flow with the middle--low Frond numbers over the rectangular now--splitting dissipator in the case of air drawn behing the pier from which the distribution laws of the pier--upstream and pier--wall pressures were obtained in the case of the pier--crest trajectory flow. This paper also analyses the relationships among the resistant coefficients of pier body with the relative height of pier, contraction ratio, and the distribution laws of Frond numbers of the controlling sections.The test results prove that when plenty of air is provided behind the pier, there will be little possibility to produce cavitation. Accordingly, the research results can be served as the reference for designing the similar energy dissipation engineering structures.