NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER

Dakka, Sam; MAWALI, Julanda AL

NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER

Julanda AL MAWALI, (Sheffield Hallam University, Department of Engineering and Math, United Kingdom)

Sam M. DAKKA (The University of Nottingham, Department of Mechanical, Materials and Manufacturing Engineering, United Kingdom)

Journal of Thermal Engineering

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Yıl: 2019 Cilt: 5 Sayı: 5 Sayfa Aralığı: 422 - 445 Metin Dili: İngilizce İndeks Tarihi: 22-10-2021

NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER

Öz:

The stability and the mean structure of methane partially premixed conical burner flames was investigatednumerically using ANSYS Fluent. The study presents and discusses the stability curves of the partially premixedflame and maps the mean flame structure based on contours of mass fraction of O2, CO and temperature. From thedata obtained, it can be concluded that both premixed and non-premixed flames are less stable than the partiallypremixed flames. An optimum level of partially premixing was found and the flames beyond this threshold werefound to be less stable. This optimum level was found, when the ratio of the mixing length to the nozzle diameter isequal to 5. At this specific degree of partially premixing, the flame exhibited triple interaction reaction zones. It wasfound that with an increase of the angle of the cone of the burner, the air entrainment increases which, in turns breaksthe stabilization core and hence cause a reduction in the flame stability limit. The main role of the cone is to providea protection from the surrounding environment at early phase of the reaction near the jet exit where turbulence withhigh intensity was observed.

Anahtar Kelime:

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	MAWALI J, Dakka S (2019). NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. , 422 - 445.
Chicago	MAWALI Julanda AL,Dakka Sam NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. (2019): 422 - 445.
MLA	MAWALI Julanda AL,Dakka Sam NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. , 2019, ss.422 - 445.
AMA	MAWALI J,Dakka S NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. . 2019; 422 - 445.
Vancouver	MAWALI J,Dakka S NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. . 2019; 422 - 445.
IEEE	MAWALI J,Dakka S "NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER." , ss.422 - 445, 2019.
ISNAD	MAWALI, Julanda AL - Dakka, Sam. "NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER". (2019), 422-445.

APA	MAWALI J, Dakka S (2019). NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. Journal of Thermal Engineering, 5(5), 422 - 445.
Chicago	MAWALI Julanda AL,Dakka Sam NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. Journal of Thermal Engineering 5, no.5 (2019): 422 - 445.
MLA	MAWALI Julanda AL,Dakka Sam NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. Journal of Thermal Engineering, vol.5, no.5, 2019, ss.422 - 445.
AMA	MAWALI J,Dakka S NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. Journal of Thermal Engineering. 2019; 5(5): 422 - 445.
Vancouver	MAWALI J,Dakka S NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER. Journal of Thermal Engineering. 2019; 5(5): 422 - 445.
IEEE	MAWALI J,Dakka S "NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER." Journal of Thermal Engineering, 5, ss.422 - 445, 2019.
ISNAD	MAWALI, Julanda AL - Dakka, Sam. "NUMERICAL ANALYSIS OF FLAME CHARACTERISTICS AND STABILITY FOR CONICAL NOZZLE BURNER". Journal of Thermal Engineering 5/5 (2019), 422-445.