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http://dx.doi.org/10.7842/kigas.2020.24.4.25

Combustion Characteristics of a Double-cone Partial Premixed Nozzle with Various Fuel hole Patterns  

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.4, 2020 , pp. 25-31 More about this Journal
Abstract
Experimental investigations were conducted to examine the combustion characteristics of a swirl-stabilized double cone premixed burner nozzle used for industrial gas turbines for power generation. Several variants with different fuel injection patterns are tested to compare the combustion characteristics such as NOx and CO emissions, stability, and wall temperature distributions. Main results show that NOx emissions and stability are decreased either when the fuel hole diameter is decreased with the same number of fuel holes, or when the number of fuel holes is reduced with the same total area of fuel holes, both of which are due to a higher penetration of fuel into the air stream. Not only is NOx reduced but also stability is enhanced when the fuel hole diameter varies in an alternating manner with the same total area of fuel holes, showing that NOx reduction is due to a higher penetration of mean fuel injection path while stability enhancement is due to a lowered penetration of minimum fuel injection path.
Keywords
double cone type combustor; jet in cross flow; partial pre-mixed combustor; gas turbine combustor; penetration length; fuel hole patterns; premixing zone;
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Times Cited By KSCI : 2  (Citation Analysis)
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