The R.A.E.4-ft x 3-ft Experimental Low-Turbulence Wind Tunnel PartⅡ. Measurements of Turbulence Intensity and Noise in the Working-Section

摘要

Measurements are given of the turbulence in the working-section together with measurements of the noisenWith all the screens fitted in the tunnel, the intensities of lateral components are of the same order as the longitudinal component and range from about 0-01 per cent to 0 03 per cent of the mean speednFrequency analyses have shown the longitudinal components to consist of fan frequencies and a low-frequency contribution at about 5 to 10 c p s The lateral components consist almost entirely of a similar low-frequency contribution.