Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
SOOT DISTRIBUTION IN TURBULENT BLUFF BODY NEAR WAKE NON PREMIXED FLAMES
Submission Author:
Luís Fernando Figueira da Silva , RJ , Brazil
Co-Authors:
Suzane Nascimento, Juan Cruz, Luís Fernando Figueira da Silva
Presenter: Luís Fernando Figueira da Silva
doi://10.26678/ABCM.ENCIT2018.CIT18-0099
Abstract
Combustion has been the foundation of worldwide industrial development for the past 200 years. In particular, industry relies heavily on the combustion process. The major uses for combustion in industry are oil and natural gas production, solution heat treating. A major concern has always been improving the energy efficiency of industrial combustion processes, however, this has shifted towards pollution emissions, such as soot. Studies on turbulent sooting flames that are similar to those found in the industrial burners are required to improve the knowledge which is a prerequisite to developing new processes. In this work, ethylene/air and methane/air turbulent flames stabilized on the near wake of a bluff body type burner are characterized by means of light extinction and laser induced incandescence techniques. This allow to measure the soot volume fraction and soot planar distribution of the studied flames. The obtained results indicate that the methane/air flames produce an order of magnitude less soot than the corresponding ethylene/air ones. Significant turbulent soot intermittence is observed, which is associated to highly distorted flame structures. Results obtained with delayed and prompt signal detection could lead to identifying the presence of polycyclic aromatic hydrocarbons.
Keywords
Laser extinction, Laser Induced Incandescence, turbulent flames, Soot
