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Tubular flames represent a class of canonical systems considered both in fundamental and applied studies in combustion science. The present study examines experimentally a newly developed variation of such systems: the liquid-fueled nonpremixed swirl-type tubular flame. This novel configuration extends existing swirl-type tubular flames (which are limited to premixed systems) to the analysis of nonpremixed systems. The configuration described herein employs a permeable material as a means to deliver vaporizing fuel into the combustion chamber for the chemical reaction with the swirling air coming from the bottom inlet. Stability limits and temperature measurements of the external burner wall are performed. Experimental results show the feasibility and a wide range of operating conditions for the proposed configuration.

Liquid Fuel Nonpremixed Swirl-Type Tubular Flame Burner