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Laminar burning velocities of hydrogen-air and hydrogen-airsteam flames

✍ Scribed by D.D.S. Liu; R. MacFarlane

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
605 KB
Volume
49
Category
Article
ISSN
0010-2180

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✦ Synopsis

The burning velocities of hydrogen-air and hydrogen-air-steam mixtures as a function of the temperature and composition of the unburned gases have been measured by laser-Doppler anemometry and schlieren photography using a constant-velocity nozzle burner. A two-cyclone in-series particle generator was designed to provide a suitable particle seeding rate for the laser-Doppler anemometer. The overall method was checked by comparing measurements for methane--air mixtures with those of Andrews and Bradley, whose data were obtained from both hot wire measurements in spherical propagating flames and double-ignition measurements in a closed vessel. Excellent agreement was observed.

Burning velocities of hydrogen-air mixtures measured at room temperature agree well with those reported by Gilnther and Janisch. New data have been obtained for the burning velocity as a function of unburned gas temperature. The addition of steam to a hydrogen-air mixture noticeably decreases the burning velocity. A correlation equation has been derived from the observed burning velocities covering a hydrogen concentration range of 18--65 volume %, a steam concentration range of 0-15 volume %, and a temperature range of 23-250~C.

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