掺气分流墩墩头动水壁压及空化特性研究

Research on the Hydrodynamic Wall Pressure Produced by Aerated-Flow-Splitting Pier and Its Cavitation

本文通过系列比尺模型研究了中、低佛氏数下掺气分流墩墩头动水壁压及空化特性，得到墩头时均和脉动壁压的分布规律、脉动壁压概率分布及墩头初生空化数等。研究结果表明，墩头脉动壁压概率分布服从正态分布；在墩后充分供气时墩头不产生空蚀及共振破坏。

The hydrodynarnic wall pressure prepuced by aerated flow splitting pier and its cavitation atmiddle-lower Frond number are studied through series of model tests. Characteristics of time-average aswell as fluctuating pressure distribution along the pier head and its probability distribution, density correlation are discussed. The paper also shows that the pier would never be cavitated if the aeration canbe drawn atter the pier and would never be damaged in the way of resonance.