Experimental Investigation of an Air-Staged Swirl Burner with Hemispherical Stabilizer for Low-NO x Combustion.
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| Title: | Experimental Investigation of an Air-Staged Swirl Burner with Hemispherical Stabilizer for Low-NO x Combustion. |
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| Authors: | Sapargaliyeva, Aigerim Nurzhanovna1 (AUTHOR), Dostiyarov, Abay Mukhamediyarovich2 (AUTHOR), Umyshev, Dias Raybekovich3 (AUTHOR) d.umyshev@satbayev.university, Baidalina, Ainura Kazhiakparovna4 (AUTHOR), Begimbetova, Ainur Serikbaevna5 (AUTHOR), Sarakeshova, Nurbubi Nurkenovna1,6 (AUTHOR), Ozhikenova, Zhannat Farhatovna1,6 (AUTHOR) |
| Source: | Energies (19961073). Feb2026, Vol. 19 Issue 4, p897. 15p. |
| Subject Terms: | *Liquefied petroleum gas, *Combustion engineering, *Flame, *Flue gases, *Atmospheric carbon monoxide, *Abatement (Atmospheric chemistry) |
| Abstract: | This study investigates the emission characteristics and flame behavior of an air-staged swirl burner operating on LPG. The burner is equipped with a 45° vane swirler and an adjustable secondary-air section. Experiments were conducted at air velocities ranging from 20 to 43 m/s using a Testo 350 gas analyzer, while temperature measurements were obtained with thermocouples positioned 90 mm downstream of the burner exit. The results show that increasing the secondary-air opening leads to a monotonic decrease in the mean exit temperature and NOx formation over the entire velocity range. In contrast, CO concentrations increase at higher air velocities and larger secondary-air fractions due to reduced residence time and partial quenching of the reaction zone. The fully staged configuration (100%) achieved the lowest NOx levels (≤3 ppm) at 20 m/s, whereas the non-staged case resulted in the highest temperatures and NO emissions. Overall, the experimental results demonstrate that a moderate secondary-air opening provides the best compromise between low NOx emissions and acceptable CO levels for compact LPG-fired swirl combustors. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | This study investigates the emission characteristics and flame behavior of an air-staged swirl burner operating on LPG. The burner is equipped with a 45° vane swirler and an adjustable secondary-air section. Experiments were conducted at air velocities ranging from 20 to 43 m/s using a Testo 350 gas analyzer, while temperature measurements were obtained with thermocouples positioned 90 mm downstream of the burner exit. The results show that increasing the secondary-air opening leads to a monotonic decrease in the mean exit temperature and NOx formation over the entire velocity range. In contrast, CO concentrations increase at higher air velocities and larger secondary-air fractions due to reduced residence time and partial quenching of the reaction zone. The fully staged configuration (100%) achieved the lowest NOx levels (≤3 ppm) at 20 m/s, whereas the non-staged case resulted in the highest temperatures and NO emissions. Overall, the experimental results demonstrate that a moderate secondary-air opening provides the best compromise between low NOx emissions and acceptable CO levels for compact LPG-fired swirl combustors. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19961073 |
| DOI: | 10.3390/en19040897 |
