Turbulent flame speeds of high H2 mixtures

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Publication Type presentation
Program American Flame Research Committee (AFRC)
Author Venkateswaran, Prabhakar; Marshall, Andrew; Bahous, Edouard; Seitzman, J. Lieuwen, Tim
Title Turbulent flame speeds of high H2 mixtures
Date 2011
Description This paper describes turbulent global consumption speed, ST,GC, measurements of H2/CO mixtures at atmospheric conditions. The turbulent flame properties of these mixtures are of strong practical interest due to the rising interest in expanding the role of coal-derived syngas fuels in the current energy portfolio. Furthermore, these mixtures are also of fundamental interest because of their strong stretch sensitivity. Data are obtained in a Bunsen burner configuration at mean flow velocities and turbulence intensities of 4 < U0 < 65 m/s and 1 < u'rms /SL,0 < 100, respectively, for H2/CO mixtures ranging from 30-90% H2 by volume. Data from two sets of experiments are reported. In the first, for a range of fuel blends from 30-90% H2, mixture equivalence ratio, f, was adjusted at each fuel composition to have nominally the same un-stretched laminar flame speed, SL,0. In the second set, equivalence ratios were varied at constant H2 levels. The data clearly corroborate results from other studies that show significant sensitivity of ST,GC to fuel composition. We have also developed a scaling law to correlate the consumption speed data of these negative Markstein length mixtures using the leading points framework. The derived scaling law closely resembles Damkohler‟s classical turbulent flame speed model except the maximum stretched laminar flame speed, SL,max, and not SL,0, arises as the normalizing parameter.
Type Text
Publisher American Flame Research Committee (AFRC)
Language eng
Rights Management (c)American Flame Research Committee (AFRC)
Format Medium application/pdf
Format Extent 844,235 bytes
ARK ark:/87278/s612686s
Setname ir_eua
Date Created 2012-10-23
Date Modified 2012-10-23
ID 213531
Reference URL https://collections.lib.utah.edu/ark:/87278/s612686s