Effect of scale and fuel type on heatrecirculation combustor performance

Younho Kim, Hwanil Huh, Jeongmin Ahn, Paul D. Ronney

Research output: Chapter in Book/Entry/PoemConference contribution


Extinction limits and combustion temperatures in heat-recirculating excess enthalpy reactors employing both gas-phase and catalytic reaction have been examined previously, with an emphasis on Reynolds number (Re) effects and possible application to microscale combustion devices. However, Re is not the only parameter needed to characterize reactor operation. In particular, the use of a fixed reactor size implies that residence time (thus Damköhler (Da), the ratio of residence to chemical time scales) and Re cannot be adjusted independently. To remedy this situation, in this work geometrically similar reactors of different physical sizes were tested with the aim of independently determining the effects of Re and Da. It is found that the difference between catalytic and non-catalytic combustion limits narrow as scale decreases. Moreover, to assess the importance of fuel chemistry, different families of fuels including alkanes, alkenes and ethers were tested. From these results the effect of scale on microscale reactor performance and implications for practical microcombustion devices are discussed.

Original languageEnglish (US)
Title of host publication5th US Combustion Meeting 2007
PublisherCombustion Institute
Number of pages7
ISBN (Electronic)9781604238112
StatePublished - 2007
Externally publishedYes
Event5th US Combustion Meeting 2007 - San Diego, United States
Duration: Mar 25 2007Mar 28 2007

Publication series

Name5th US Combustion Meeting 2007


Other5th US Combustion Meeting 2007
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

  • General Chemical Engineering
  • Physical and Theoretical Chemistry
  • Mechanical Engineering


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