Experimental investigation of flame stability limits of a mesoscale combustor with thermally orthotropic walls

Kang, Xin and Veeraragavan, Ananthanarayanan (2015) Experimental investigation of flame stability limits of a mesoscale combustor with thermally orthotropic walls. Applied Thermal Engineering, 85 234-242. doi:10.1016/j.applthermaleng.2015.04.017


Author Kang, Xin
Veeraragavan, Ananthanarayanan
Title Experimental investigation of flame stability limits of a mesoscale combustor with thermally orthotropic walls
Journal name Applied Thermal Engineering   Check publisher's open access policy
ISSN 1359-4311
Publication date 2015-06-25
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.applthermaleng.2015.04.017
Open Access Status
Volume 85
Start page 234
End page 242
Total pages 9
Place of publication Oxford United Kingdom
Publisher Pergamon Press
Collection year 2016
Language eng
Abstract Flame stability limits were experimentally investigated for a parallel plate mesoscale combustor with orthotropic walls. The combustor walls were made of pyrolytic graphite, which has orthotropic thermal conductivity of 350 W/m-K in ab-plane and 3.5 W/m-K in the c-plane at room temperature. Infrared images of the combustor walls showed that the pyrolytic graphite plates had uniform temperature distributions at all operating conditions tested. Compared to an isotropic material (stainless steel), pyrolytic graphite showed a greater high velocity limit (HVL) and thereby wider flame stability limit. Thermal performance of the combustor was also evaluated via an energy balance, wherein, heat losses were found to dominate the thermal fluxes. The uniform temperature profile and the lack of a distinctive “hot spot” in the thermal images of the pyrolytic graphite indicate that it is a suitable combustor material for thermoelectric and thermophotovoltaic power conversion applications. Future work should focus on the thermal management so as to avoid excessive heat losses leading to an improvement in the thermal performance of the combustor.
Keyword Microcombustion
Mesoscale combustion
Flame stability
Thermally orthotropic materials
Conjugate heat transfer
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
 
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Created: Tue, 12 May 2015, 15:25:09 EST by Anand Veeraragavan on behalf of School of Mechanical and Mining Engineering