Análisis de la combustión de un quemador de gas tipo Venturi con premezcla del Laboratorio de Energía de la Facultad de Ingeniería Civil y Mecánica utilizando simulación CFD mediante el software ANSYS Fluent

Abstract

In this experimental work the combustion process of the Venturi Burner of the Energy Laboratory of the Faculty of Civil and Mechanical Engineering is analyzed by means of CFD simulation using the finite volumes method, from a 3D model in CAD software, with volume extraction for mesh discretization, a 2D external domain was finally generated for flame simulation. It was carried out in three stages, in which the first is the generation of mesh geometry and discretization, this was evaluated with the Skewness method, in the second stage the simulations are performed according to different input conditions. The third stage comprises the validation of results. The mesh metric results were values close to zero, suitable for the simulations. High efficiency values were obtained as the speed of the outside air increases, these results are validated with a flame intake using thermography. The shape of the flame was compared, reaching relative errors of less than five percent in terms of isotherm areas. In terms of perimeters and lengths, the error value increased to a value close to ten percent. The maximum temperature reached in the combustion process was from 900 to 1044 Kelvin degrees, where the best efficiency was reached with an isotherm area of 700 Kelvin degrees of 0.047 square meters corresponding to a length of 0.64 meters and a composition air gas from 47 to 53 at the beginning of the mixing zone with a relative position x equal to 0.085 meters.