Flow Field Determination in Nearly Isotropic Turbulence of Any Intensity by Hot-wire Anemometry

Abstract

In order to discuss the influence of turbulence on turbulent burning velocity and to compare the experimental results of many workers with each other quantitatively, it is necessary to represent a turbulent field using the parameters with general definition. Some arbitrariness was unavoidable in the definition of turbulence parameters especially in the study of turbulent combustion in a closed bomb, in which the turbulence was measured usually with a hot-wire anemometer. A procedure for the analysis of a turbulent field of any turbulence intensity by processing the DC and AC indication of a squared anemometer output signal of the effective cooling velocity, is described and the results of the turbulence parameters in a closed bomb, such as intensity, temporal scale and spatial scale, in comparison with those by conventional method, are shown in this paper.