Effect of Pulsation Characteristics of Fuel Flow on Local Equivalence Ratio,  Combustion,  and NOx Emission in a Nozzle-Mixed Burner

Hookyung Lee; Jonghyun Kim; Jungsoo Park; Young Tae Guahk

doi:10.15231/jksc.2022.27.3.024

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2022 Vol.27, Issue 3 Preview Page Next Page

Research Article

Effect of Pulsation Characteristics of Fuel Flow on Local Equivalence Ratio, Combustion, and NO_x Emission in a Nozzle-Mixed Burner 연료유량 제어밸브의 작동특성에 따른 로컬 당량비 변화와 연소 및 질소산화물 발생의 관계

30 September 2022. pp. 24-33

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Abstract

The present work investigated the NO_x reduction effect that can be obtained by periodically changing the local equivalence ratio by repeatedly controlling the fuel flow. When there was no pressure pulsation of the fuel, the NO_x emission was 30.3 ppm (O₂ vol.11%), and the NO_x emission was reduced from 4% to 30% according to the pulsation variables. Since it is difficult to directly measure the instantaneous mass and volumetric flow rate during a periodic change on a 10³-millisecond scale in an industrial-scale experiment, the measured pressure was used to calculate the mass and volumetric flow rate. The fuel and air supply pressure was fixed at 700 mmH₂O, and when flow pulsation occurred in the fuel pipe, the pressure was changed within the range of 150 to 694 mmH₂O. As a result of calculation through the one-dimensional model, it had a local equivalence ratio range of 0.108 to 0.776. In the chemical equilibrium domain of methane, the relationship between the local equivalence ratio change and combustion products according to the operating characteristics of the fuel-flow pulsation valve was discussed.

Keywords

Fuel flow

Pulsation

Periodic control

Combustion

NO_x reduction

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Available at: http://www.gaseq.co.uk 2022.

Information

Publisher :The Korean Society Combustion
Publisher(Ko) :한국연소학회
Journal Title :Journal of The Korean Society Combustion
Journal Title(Ko) :한국연소학회지
Volume : 27
No :3
Pages :24-33
Received Date : 2022-07-31
Revised Date : 2022-08-14
Accepted Date : 2022-08-29
DOI :https://doi.org/10.15231/jksc.2022.27.3.024

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

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