A Numerical Study on NOx Emission by Using Micro Hydrogen Jet Flames

Changhyun You; Sangsoon Hwang

doi:10.15231/jksc.2021.26.3.035

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2021 Vol.26, Issue 3 Preview Page Next Page

Research Article

A Numerical Study on NOx Emission by Using Micro Hydrogen Jet Flames 마이크로 수소제트 화염을 이용한 NOx 배출 저감 특성에 관한 수치해석 연구

30 September 2021. pp. 35-41

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Abstract

As exhaust gas regulations has become strick, interest in hydrogen used as a renewable energy has been increased. Recently research on low NOx emission through micro jet flame combustion methods has been carried out. In this study, multiple micro flame formation in the jet in the flow condition was assessed numerically. Particulary the flame shape and NOx emission characteristics according to the fuel-air momentum ratio were analyzed by changing the internal fuel cylinder diameter giving effects on the pressure drop and the size of the recirculation zone. Among the five momentum ratio (J) modes classified in jet in the flow geometry, the strong jet and jet dominated modes were studied in this study. In the strong jet mode, large J hardly makes the hydrogen jet deflected. On the other hand, In the case of the jet dominated mode the relatively high cross-flow momentum tends to make mixing rate suitable for making micro hydrogen flame. And the most important factor for NOx generation and emission in combustion using hydrogen fuel is considered to maintain a micro-flame using an appropriate momentum ratio.

Keywords

Micro flame

Jet In Cross Flow

Low NOx

combustion

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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 : 26
No :3
Pages :35-41
Received Date : 2021-06-24
Revised Date : 2021-07-26
Accepted Date : 2021-08-12
DOI :https://doi.org/10.15231/jksc.2021.26.3.035

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

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