An experimental study on the effects of swirling oxidizer flow and diameter of fuel nozzle on behaviour and light emittance of propane-oxygen non-premixed flame

Thermal Science

Javareshkian Alireza¹  Tabejamaat Sadegh²  Baigmohammadi Mohammadreza²  Sarrafan-Sadeghi Soroush² 

[1] Amirkabir University of technology (Tehran polytechnic), Department of Aerospace Engineering, Combustion and Turbulence Research Laboratory (CTL), Tehran, Iran + Politecnico di Milano, Scoula di Ingegneria Industriale, Milano, Italy;Amirkabir University of technology (Tehran polytechnic), Department of Aerospace Engineering, Combustion and Turbulence Research Laboratory (CTL), Tehran, Iran;

关键词: swirl effect;    propane;    oxygen;    fuel nozzle;    non-premixed flame;    light emittance;   

DOI  :  10.2298/TSCI140706210J

来源: DOAJ

【 摘 要 】

In this study, the stability and the light emittance of non-premixed propane-oxygen flames have been experimentally evaluated with respect to swirling oxidizer flow and variations in fuel nozzle diameter. Hence, three types of the vanes with the swirl angles of 30°, 45°, and 60° have been chosen for producing the desired swirling flows. The main aims of this study are to determine the flame behaviour, light emittance, and also considering the effect of variation in fuel nozzle diameter on combustion phenomena such as flame length, flame shape, and soot free length parameter. The investigation into the flame phenomenology was comprised of variations of the oxidizer and fuel flow velocities (respective Reynolds numbers) and the fuel nozzle diameter. The results showed that the swirl effect could change the flame luminosity and this way could reduce or increase the maximum value of the flame light emittance in the combustion zone. Therefore, investigation into the flame light emittance can give a good clue for studying the mixing quality of reactants, the flame phenomenology (blue flame or sooty flame, localized extinction), and the combustion intensity in non-premixed flames.

【 授权许可】

Unknown