A Numerical Study on NOX Emission of Swirl Premix Burner Affected by Air Fuel Ratio and Air Slit Area in a Model Gas Turbine Combustor

Yuan Gang Wang, Jun Ho Park and Chae Hoon Sohn

doi:10.15231/jksc.2020.25.4.001

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Research Article

A Numerical Study on NO_X Emission of Swirl Premix Burner Affected by Air Fuel Ratio and Air Slit Area in a Model Gas Turbine Combustor 스월 예혼합 버너를 장착한 가스터빈 연소실에서 공연비와 공기 슬릿 면적 변화에 따른 NO_X 배출에 관한 수치적 연구

December 2020. pp. 1-7

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Abstract

Two factors that affect NO_X emission of swirl premix burner are investigated numerically in the present study. The first one is air fuel ratio which is changed from 31.7 to 38.7 by keeping the air flow rate and decreasing the fuel flow rate. As the air fuel ratio increases, the mixing is enhanced and temperature of a model combustor decreases. Then, the NO_X emission decreases. The second factor is the air slit area of the burner. Air slit area is reduced by changing the width of slit with 3 methods depending on the position, i.e., width decrease in the upper-side, the lower-side, and both sides. The velocity of air inflow increases as the air slit width decreases. Then, unmixedness inside the burner will be reduced, which results in reduction of NO_X emission. This strong correlation between unmixedness and NO_X emission verifies that NO_X reduction can be attained by mixing enhancement of fuel and air inside the burner.

Keywords

Swirl premix burner

Gas turbine

NO_X emission

Air fuel ratio, Air slit

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Information

Publisher :The Korean Society Combustion
Publisher(Ko) :한국연소학회
Journal Title :Journal of The Korean Society Combustion
Journal Title(Ko) :한국연소학회지
Volume : 25
No :4
Pages :1-7
Received Date :2020. 08. 29
Revised Date :2020. 08. 31
Accepted Date : 2020. 09. 13
DOI :https://doi.org/10.15231/jksc.2020.25.4.001

Journal of The Korean Society Combustion ISSN:1226-0959(Print) 2466-2089(Online) 한국연소학회지

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