Premixing Combustion of Fuel Sprays by the Cyclone-Jet Combustor and NOx Reduction
| Autor: | Yuichi Ohwada, Yasushi Hoshino, Yoshiaki Onuma, Toshitake Kogure, Mitsuhiro Uejima |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 72:1812-1817 |
| ISSN: | 1884-8346 0387-5016 |
| DOI: | 10.1299/kikaib.72.1812 |
| Popis: | As a means for a stable premixed combustion, there is a so-called cyclone combustor, which consists of a cylindrical chamber and fuel nozzles installed tangentially on the side wall. In this combustor an extremely stable flame can be obtained in the swirl flow, formed along the inner wall of the combustor. The authors utilized this combustor as a flame holder, to burn a high velocity jet flowing axially in the central part, and named this combustor a cyclone-jet combustor. In general, it is difficult for the low NOx combustion to occur in spray combustion. In the present study, experiments on the spray combustion by the cyclone-jet combustor were carried out, and comparing the co-axial fuel spray and fuel gas jet flames. Kerosene and propane were used for fuel. With the air flow rate changed, the effect of the premixing on the NOx formation was examined. It was shown that the increase of the air flow rate reduces the NOx emission, and the shape of the spray flames is almost the same as the gas flames. The results suggest that the premixing after the process of the injection of fuel becomes very effective for NOx reduction in spray combustion. |
| Databáze: | OpenAIRE |
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