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LAMINAR FLAME PROPAGATION OF HYDROGEN-AIR MIXTURES IN TUBES | ||
| AL-TAQANI | ||
| Article 1, Volume 21, Issue 1, 2008, Pages 146-155 | ||
| Author | ||
| Esam M. Mohamed | ||
| Abstract | ||
| The laminar flame speed of hydrogen-air mixture as a function of the composition of the unburned gases has been measured during the pre-pressure period, in tubes of diameters (0.038, 0.048, 0.057 & 0.1 m.) using optical technique. A detailed density correction scheme was employed for determination of burning velocities from the measured flame speed. A mathematical model is employed to calculate the emissivity and temperature of flame, assuming that the dominant emitting specie is water vapour. The maximum values of burning velocity, flame speed, and flame temperature occur in a rich mixture of hydrogen concentration of about (40%) independently of tube diameter. Burning velocities of hydrogen-air mixtures measured at (298oK) and (100kPa) agree well with the published results. A correlation equation has been derived from the observed burning velocities covering a hydrogen-concentration range of (10-70 volume %) and a tube diameter range of ( 0.038 – 0.1 m.), at initial mixture temperature (Tu = 298oK) and (Po=100 kPa). | ||
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