Investigation of Shapes and Extinction Limits of Premixed Flames in Large Centrifugal Acceleration Field

Abstract:

This paper presents the influence of the body-force in large centrifugal acceleration field on the shapes and extinction limits of the premixed flame of liquefied petroleum gas (LPG) and air. Experiments of combustion in various centrifugal acceleration fields were performed. The results indicate that the magnitude of the resultant body-force, composed mainly of centrifugal force and Coriolis force, is not the only cause of the extinction of flames, but the direction between the resultant body-force and jet direction of the premixed gases plays more important role. Coriolis force, which is always perpendicular to jet direction of the gases, results in the flame turning to sides of the nozzle, even extinction. The buoyancy effect is the mainly element to make the flame shape change: shorten, lengthen or deflect, and improve or weaken combustion. It is favorable for stability of the flame as the included angle of rotating tangent direction to gas flow jet direction is positive.

• Periodical: Advanced Materials Research (Volumes 455-456)
• Pages: 327-333
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.455-456.327
• Online since: January 2012
• Authors: Jin Xiang Wu, En Yu Wang, Lian Sheng Liu, Xiang Gou
• Keywords: Body-Force, Flame Shape, Large Centrifugal Acceleration Field, Premixed Flame, Stability

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