掺气分流墩墩头脉动壁压及其模型律试验研究

Study on hydrodynamic wall pressure acting on flow splitting pier and its similarity law

本文研究了中、低弗氏数掺气分流墩墩头脉动壁压及其模型律，得到时均和脉动壁压的分布规律、脉动壁压概率分布、自功率谱密度、自相关系数及墩头初生空化数．研究结果表明，墩头脉动壁压幅值模型律为重力律，优势频率模型律则为ｆλ≈１．

The hydrodynamic pressure acting on flow splitting pier has been studied both in prototype and in model tests. The characteristics of time averaged as well as fluctuating pressure distributions acting on the pier head, have been discussed. The data measured show that the similarity law of mean square root of fluctuating pressure obeys the Froude law, while the scale of the dominant frequency is appoximately equal to 1.