摘要
The correlation, between wall fluctuating pressure and fluctuating velocity, on the bed of plunging pool under the action of single and twin impinging jet, and their spectrum and turbulent scale are investigated in the paper by using 2-D LDA and the dynamic pressure scanning system of multiple points. It is found that the cross correlation between the horizontal fluctuating velocity and the fluctuating pressure of twin jet is bigger than that of single jet, and the spectrums of horizontal fluctuating velocity and fluctuating pressure obviously have approximately same dominant frequency. The relationship between the fluctuation pressure coefficient on wall and the turbulent intensity near the wall can be described with logarithmic curve.
The correlation, between wall fluctuating pressure and fluctuating velocity, on the bed of plunging pool under the action of single and twin impinging jet, and their spectrum and turbulent scale are investigated in the paper by using 2-D LDA and the dynamic pressure scanning system of multiple points. It is found that the cross correlation between the horizontal fluctuating velocity and the fluctuating pressure of twin jet is bigger than that of single jet, and the spectrums of horizontal fluctuating velocity and fluctuating pressure obviously have approximately same dominant frequency. The relationship between the fluctuation pressure coefficient on wall and the turbulent intensity near the wall can be described with logarithmic curve.
