Details

Title

Investigation on Effect of Air Velocity in Turbulent Non-Premixed Flames

Journal title

Archive of Mechanical Engineering

Yearbook

2016

Numer

No 3

Publication authors

Keywords

Mechanical Engineering ; Mechanics of Materials

Divisions of PAS

Nauki Techniczne

Abstract

<jats:title>Abstract</jats:title><jats:p>In this study, the turbulent non-premixed methane-air flame is simulated to determine the effect of air velocity on the length of flame, temperature distribution and mole fraction of species. The computational fluid dynamics (CFD) technique is used to perform this simulation. To solve the turbulence flow, k-ε model is used. In contrast to the previous works, in this study, in each one of simulations the properties of materials are taken variable and then the results are compared. The results show that at a certain flow rate of fuel, by increasing the air velocity, similar to when the properties are constant, the width of the flame becomes thinner and the maximum temperature is higher; the penetration of oxygen into the fuel as well as fuel consumption is also increased. It is noteworthy that most of the pollutants produced are NOx, which are strongly temperature dependent. The amount of these pollutants rises when the temperature is increased. As a solution, decreasing the air velocity can decrease the amount of these pollutants. Finally, comparing the result of this study and the other work, which considers constant properties, shows that the variable properties assumption leads to obtaining more exact solution but the trends of both results are similar.</jats:p>

Publisher

Polish Academy of Science, Committe of Machine Design

Date

2016

Identifier

ISSN 0004-0738, e-ISSN 2300-1895

DOI

10.1515/meceng-2016-0020

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