✦ LIBER ✦

Effects of swirl on the stability of jet diffusion flames

✍ Scribed by S. Yuasa

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 958 KB
Volume: 66
Category: Article
ISSN: 0010-2180
DOI: 10.1016/0010-2180(86)90090-8

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✦ Synopsis

An experimental study was made, using a double-swirl burner, of the stability of swirling-fuel-jet diffusion flames in swirling air streams. The fuels were hydrogen and methane. The primary variables studied were swirl intensities of the fuel jet and the air stream. It was found that the stability of flame depended on the swirl intensity of both the fuel jet and the air stream. The application of swirl to the fuel jet decreased the rim stability of the flame, but increased the blowout stability of the lifted diffusion flame. For low swirl intensity of the air stream, the effect was similar to that of the fuel jet. At higher swirl intensities of the air stream, above a critical value, the flame stability increased noticeably because of the formation of a recirculation zone near the injector exit. Even in strongly swirling air streams, the favorable effect of fuel swirl on stability of the lifted flame was evident, particularly for the methane flame.

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