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Experimental and Numerical Studies of the Fundamental Flame Speeds of Methane/Air and Syngas (H2/CO)/Air Mixtures

Abstract : In the context of CO2 emission reduction, the present study is devoted to the development of a laminar flame speed measurement methodology, using the Digital Particle Image Velocimetry (DPIV) diagnostic. The latter is applied to stagnation flow flames, seen to have considerable assets for such studies. Indeed, flames stabilized in these diverging flows are planar, steady and in near-adiabatic conditions, while subtraction of strain effects on flame is intrinsically allowed. The methodology developed herein has been applied to the well-characterized methane/air mixtures for validation. An extensive comparison with the literature datasets has been provided. Both 1D (PREMIX, OPPDIF) as well as 2D (Fluent©) numerical tools have been used to confirm the reliability and accuracy of the developed approach. A particular attention has been given to the characterization of the seeding particle motion within the diverging flow, with consideration of the often-neglected thermophoretic force. Fundamental flame velocities of various syngas (H2+CO) mixtures have been investigated using multiple experimental approaches including the aforementioned counterflow methodology as well as spherical and conical flame configurations. Performed measurements from the different approaches have been confronted and flame sensitivities to stretch have been characterized for a wide range of equivalence ratios (E.R.=0.4 to 5.0) and mixture compositions (5/95 to 50/50 % H2/CO).
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https://tel.archives-ouvertes.fr/tel-00473266
Contributor : Nicolas Bouvet <>
Submitted on : Thursday, April 15, 2010 - 9:21:05 AM
Last modification on : Thursday, March 5, 2020 - 6:48:55 PM
Long-term archiving on: : Wednesday, November 30, 2016 - 4:40:19 PM

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  • HAL Id : tel-00473266, version 1

Citation

Nicolas Bouvet. Experimental and Numerical Studies of the Fundamental Flame Speeds of Methane/Air and Syngas (H2/CO)/Air Mixtures. Electric power. Université d'Orléans, 2009. English. ⟨tel-00473266⟩

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