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http://dx.doi.org/10.7842/kigas.2020.24.1.49

Characteristics of Multi staged Combustion on a Double-cone Partial Premixed Nozzle  

Kim, Han Seok (Korea Institute of Machinery & Materials)
Cho, Ju Hyeong (Korea Institute of Machinery & Materials)
Kim, Min Kuk (Korea Institute of Machinery & Materials)
Hwang, Jeongjae (Korea Institute of Machinery & Materials)
Lee, Won June (Korea Institute of Machinery & Materials)
Publication Information
Journal of the Korean Institute of Gas / v.24, no.1, 2020 , pp. 49-55 More about this Journal
Abstract
Experimental investigations were conducted to understand the multi-staged combustion characteristics of a swirl-stabilized double cone premixed burner nozzle used for industrial gas turbines for power generation. Multi-staged combustion is implemented by injecting the fuel through the existing manifold of the side slots as well as through the apex of the cone with two fuel injection angles which are slanted or axial. NOx and CO emissions, and wall temperature distributions were measured for various fuel distributions and operating conditions. Results show that NOx emissions are decreased when the fuel distribution to the apex is 3% of the total amount of fuel, which is due to more uniform fuel distribution inside the nozzle, hence less hot spots at the flame. NOx emissions are rather increased when the fuel distribution to the apex is 8% of the total amount of fuel for axial fuel injection by occurrence of flash back in premixing zone of burner.
Keywords
Double cone type combustor; Jet in cross flow; Partial pre-mixed combustor; Gas turbine combustor; Penetration length; Premixing zone;
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