Simulations of a micro-liter fuel ignition tester

Document Type

Conference Proceeding

Publication Date

1-1-2017

Abstract

A millimeter-scale flow reactor consisting of a cylindrical tube with a controlled temperature profile is studied through numerical simulations. Stable flames are observed at high and low velocity regimes and non-stationary dynamic flames (with repetitive extinction and ignition) are observed at moderate velocity regimes. The focus is placed on the dynamic flames since the cyclic ignition/extinction behavior is expected to be sensitive to both chemical kinetics and transport. A fast, one-dimensional, unsteady flame solver designed to handle large chemical mechanisms and different transport models is used. Computations are performed to compare four different transport models of varying complexity and computational cost: constant Lewis numbers, mixture-averaged diffusion coefficients excluding thermal diffusion, mixture-averaged diffusion coefficients including thermal diffusion, and multi-component species diffusion including thermal diffusion. The simulations are compared to recent experimental results for varying flow velocities and different gaseous fuels.

Publication Source (Journal or Book title)

10th U.S. National Combustion Meeting

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