Influence of Geometry and Heat Release on Counterflow Diffusion Flames: A Navier-Stokes Model

Abstract

A Navier-Stokes simulation of the opposed jet counterflow diffusion flame (CFDF) using a fuel-lean methane jet is described in this work. Plug flow (PLF) and parabolic flow (PAF) jet exit velocity profiles have been used in the simulation, and the results show that the changing the velocity profile has a large influence on flame stretch. Flame stretch was also found to be strongly dependent on the jet separation distance. Flame stretch increased as jet separation decreased. Comparing non-reacting and reacting cases indicated that heat release in the flame zone modifies the velocity profile and hence the strain. The flame responded easily to changes in variables such as fuel/air jet velocity ratio, and the nitrogen coflow. The flame was also sensitive to the arrangement of the side walls that encloses the CFDF burner.

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 American Institute of Aeronautics and Astronautics, All rights reserved.

Publication Date

01 Jan 1995

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