@Article{hmt.5.16,
AUTHOR = {Junjie Chen, Longfei Yan, Wenya Song},
TITLE = {EFFECT OF WALL THERMAL CONDUCTIVITY ON MICRO-SCALE  COMBUSTION CHARACTERISTICS OF HYDROGEN-AIR MIXTURES  WITH DETAILED CHEMICAL KINETIC MECHANISMS IN Pt/γ-Al<sub>2</sub>O<sub>3</sub> CATALYTIC MICRO-COMBUSTORS},
JOURNAL = {Frontiers in Heat and Mass Transfer},
VOLUME = {5},
YEAR = {2014},
NUMBER = {1},
PAGES = {1--6},
URL = {http://www.techscience.com/fhmt/v5n1/54893},
ISSN = {2151-8629},
ABSTRACT = {To understand the effect of different thermal conductivities on catalytic combustion characteristics, effect of thermal conductivity on micro-combustion 
characteristics of hydrogen-air mixtures in Pt/γ-Al<sub>2</sub>O<sub>3</sub> catalytic micro-combustors were investigated numerically with detailed chemical kinetics 
mechanisms. Three kinds of wall materials (100, 7.5, and 0.5 W/m·K) were selected to investigate the effect of heat conduction on the catalytic 
combustion. The simulation results indicate that the catalytic reaction restrains the gas phase reaction in Pt/γ-Al<sub>2</sub>O<sub>3</sub> catalytic micro-combustors. The 
gas phase reaction restrained by Pt/γ-Al<sub>2</sub>O<sub>3</sub> catalysts is sensitive to thermal boundary condition at the wall. For most conditions, the gas phase reaction 
cannot be ignored in Pt/γ-Al<sub>2</sub>O<sub>3</sub> catalytic micro-combustors. For low thermal conductivity, the higher temperature gradient on the wall will promote 
the gas phase reaction shift upstream; high temperature gradient exists on the wall, and the hot spot can cause the material to melt or degrade the 
catalyst. Due to the gas phase reaction is ignited and sustained in micro-combustors by the heat from the catalytic reaction, the effect of thermal 
conductivity on micro-scale combustion characteristics is not as obvious as it is in micro-combustors without Pt/γ-Al<sub>2</sub>O<sub>3</sub> catalysts.},
DOI = {10.5098/hmt.5.16}
}