An Experimental Study on Turbulent Characteristics of Hybrid Type Fractal Grid Flames

Jung Hyun Kim; Kee Man Lee

doi:10.15231/jksc.2023.28.4.043

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2023 Vol.28, Issue 4 Preview Page

Research Article

An Experimental Study on Turbulent Characteristics of Hybrid Type Fractal Grid Flames 하이브리드타입 프랙탈격자 화염의 난류특성에 관한 실험적 연구

31 December 2023. pp. 43-53

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Abstract

This study focuses on the V-shape with hybrid type fractal grid generator to evaluate the turbulent characteristics of turbulent premixed flames. In this work, the mean and velocity fluctuation, turbulence intensity were investigated. The integral length scale of non-reactive flow was additionally investigated to obtain a Borghi-Peters diagram. By comparing the Borghi-Peters diagram shown as a result of the non-reactive flow based with the reaction OH-PLIF images, it was confirmed that the flame characteristics of each regimes in fractal grid flames were well represented. Also, the irreguar turbulence of premixed flames was quantitatively analyzed using the flame brushes obtained by the mean progress variable analysis. As a result, the flame brushes of the hybrid type fractal turbulence generator were wider than the conventional fractal grid generator with individuial shape of cross and square grid. This means that the turbulence intensity has increased compared to the previous conventional fractal grid, and the local displacement speed is also expected to increase.it has increased compared to the existing fractals of the hybrid type, and the local displacement speed is also expected to increase.

Keywords

V-shape flame

Hybrid fractal grid

OH-PLIF

Mean progress variable

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Information

Publisher :The Korean Society of Combustion
Publisher(Ko) :한국연소학회
Journal Title :Journal of the Korean Society of Combustion
Journal Title(Ko) :한국연소학회지
Volume : 28
No :4
Pages :43-53
Received Date : 2023-12-11
Revised Date : 2023-12-28
Accepted Date : 2023-12-28
DOI :https://doi.org/10.15231/jksc.2023.28.4.043

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

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