Effect of low-frequency vibrations on the characteristics of the diffusion flame

Abstract

The paper considers the effect of low-amplitude acoustic oscillations on the temperature field in the flame formed during the combustion of kerosene gasoline. As a result of using the IRT-method, sets of thermograms of the combustion process were obtained. For the obtained thermograms, the distribution of high-temperature inhomogeneities in the flame plume was analyzed. As a result, it was obtained that the effect of acoustic oscillations on the flame plume causes a change in the height of the plume, a change in the combustion rate. When analyzing the spectra of temperature changes, characteristic pulsations, which are different, depending on the flame zone, were observed. Analysis of the distribution of temperature inhomogeneities under different modes of exposure to pressure pulsations, allowed to identify the characteristic modes in which there is a change in the geometric dimensions of the temperature inhomogeneity distribution zone.