Effect of scale on the performance of heat-recirculating reactors

Hwayoung Oh, Hwanil Huh, Jeongmin Ahn, Paul D. Ronney

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Extinction limits and combustion temperatures in heat-recirculating excess enthalpy reactors employing both gas-phase and catalytic reaction bave been examined previously, with an emphasis 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 wall thermal conductivity, reactors of varying wall thickness were studied; results were consistent with theoretical predictions. 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 publicationCollection of Technical Papers - 4th International Energy Conversion Engineering Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages855-862
Number of pages8
ISBN (Print)156347817X, 9781563478178
DOIs
StatePublished - 2006
Externally publishedYes
Event4th International Energy Conversion Engineering Conference - San Diego, CA, United States
Duration: Jun 26 2006Jun 29 2006

Publication series

NameCollection of Technical Papers - 4th International Energy Conversion Engineering Conference
Volume2

Other

Other4th International Energy Conversion Engineering Conference
CountryUnited States
CitySan Diego, CA
Period6/26/066/29/06

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Oh, H., Huh, H., Ahn, J., & Ronney, P. D. (2006). Effect of scale on the performance of heat-recirculating reactors. In Collection of Technical Papers - 4th International Energy Conversion Engineering Conference (pp. 855-862). (Collection of Technical Papers - 4th International Energy Conversion Engineering Conference; Vol. 2). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2006-4121