Hot wire measurement in the interacting two‐plane parallel jets

Abstract

Abstract This study presents the data of turbulence properties in the two‐plane parallel air jets which merge as they issue into still surroundings. These turbulent properties (time averaged and root mean square velocities, Eulerian auto and cross correlation coefficients, various scales of turbulence, energy spectra, and probability density functions of fluctuating velocities) were measured in both the converging and combined regions of the jets by using the X array, hot wire anemometers. The negative high shear stress existed in the merging region. Strictly speaking, the turbulent flow in this region is not isotropic. In the combined region, the turbulent mechanics of these jets are essentially the same as that of the single plane jet. All of the spectra in these jets had a slope of 5/3 over about one decade of the wave number space. The probability density functions were Gaussian except for the boundary to the surrounding air.