Premixed wake flame in a porous cylindrical burner
Date Issued
2010
Date
2010
Author(s)
Lin, Wen-Chang
Abstract
An experimental study to investigate the effect of the forced convection and natural convection flow field on the combustion of cylindrical porous medium is presented.
The lean combustion using the cylindrical porous medium as burner ejected the mixing air-fuel uniformly to produce a stable flame. In addition, using different L/D to determine the lean flammability limits value、heat loss and flame stability mechanism between the single cylinder burner and double cylinder burner has been discussed in this study.
The result shows that the cylinder diameter is the negative correlation of gradient velocity. The increasing gradient of flame extinction velocity is relative a decreasing L/D. In natural convective fluid field, the lean flammability limit of premixed flame combustion is 0.33; in forced convective fluid field, single cylindrical burner of the lean flammability limit of premixed flame combustion is 0.39. Double cylindrical burner of the lean flammability limit of premixed flame combustion and L/D are related. When L/D=1.02、1.2、1.4,the double cylindrical burner of the lean flammability limit of premixed flame combustion are 0.33、0.37、0.39. lean flammability limit is corresponded the objective of expanding lean flammability limit by flame interaction.
Subjects
cylindrical porous
lean combustion
lean flammability limits value
envelope flame
side flame
wake flam
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