多股射流入射水垫塘点面脉动压力特性

Characteristics of Point and Area Wall Fluctuating Pressure by Multiple Jets Impinging into Plunge Pool

本文首次对１：１００大比尺的水垫塘模型在多股射流入射时的底板点面脉压进行了多组次量测，对点面壁压的自相关特性，点面脉动强度关系及点面关系的频谱特性进行了分析，得到点面壁压脉动强度均化系数Ｃｐ与承压面积Ｓ和水垫塘水垫深度ｈｔ的经验公式。这些结果为工程设计提供了重要的依据。

In this paper, the point and area wall fluctuating pressure by multiple jets impinging into a plunge pool were measured in a 1:100 scale hydraulic test model. The autocorrelation characteristics of point and area wall fluctuating pressures, the relationship between point wall fluctuating pressure and area wall fluctuating pressure and the spectrum of point and area wall fluctuating pressure have been analyzed and disccussed. An empirical formula for the converting coefficient Cp between their RMS of fluctuating pressure and an empirical formula described the relationship between Cp and the depth water cushion have been obtained.