Effect of magnetic field on temperature profile and flame flow characteristics of micro flame using Talbot interferometer

Abstract

In this paper an application of circular grating Talbot interferometer is investigated for measurement of temperature and temperature profile of micro flame under the influence of gradient and uniform magnetic field. Hilbert transform is used for phase extraction from a single Talbot interferometric fringe pattern. In addition to this a numerical study is undertaken to established the effect of magnetic field on flame flow characteristics such as flame length, fuel mass flow rate, magnetic susceptibility and mass fractions of oxygen which is the main oxidizer and products of combustion in candle flame is demonstrated. Experimental investigation reveals that the temperature of the flame is increased under the influence of the upward-decreasing magnetic field and decreased in upward-increasing magnetic field. In a uniform magnetic field the flame temperature is also increased, which is in contrast to the normal diffusion (large size) flame. The system is cost effective, easy to align, less prone to environmental perturbation and capable of measuring temperature of a large size (centimeter) flame to micro size (millimeter) flame.