Abo Bibliothek: Guest
Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

THREE-DIMENSIONAL FLAME HOLDING MECHANISM MEASURED BY STEREOSCOPIC PIV

pages 151-156
DOI: 10.1615/TSFP2.250
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ABSTRAKT

The three-dimensional flame holding mechanism in a gun-type burner has been investigated as well as the fuel droplet dynamics. This gun-type burner forms a recirculating swirling flow with a complex structure, essential for understanding the flame holding mechanism. The swirl flow will increase fuel-air mixing, improve flame stabilization and prevent flame attachment on the baffle plate. The central plane of the burner has been analyzed by means of Stereoscopic PIV. That technique allows the measurement of the full three-dimensional velocity vector map in a fluid plane. A complex swirl motion has been founded for the reacting condition, with the formation of a couple of twin vortex in the shear flow region that is bordering the recirculation areas. The influence of the incoming airflow velocity has been studied, founding the strongest effect on the axial and radial components, with changes in the reversing flow structure, but almost no influence on the swirl component.

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