Combustion of Hydrogen-Oxygen Characteristics in a Sub-Millimeter Scale Catalytic Combustor

Micro power generators have high power density. However, as the combustion chamber dimension decreases, the ratio of surface area to volume increases. In a micro-scaled combustion chamber, heat losses through the wall may take significant percentage of the total combustion heat generation within the chamber volume. In order to get higher stability and volumetric chemical reaction rate. we present experimental results in a catalytic microcombustor .The experimental results show that owing to the catalytic effect of platinum, the temperature along the wall of the catalytic microcombustor is higher than that of the non-catalytic micro- combustor under the same testing conditions. numerically simulations by using the FLUENT and detailed chemical reaction mechanisms. The combustion characteristics of different inlet velocity on surface catalytic combustion reaction were discussed,the results show that inlet velocity has important influence on catalytic combustion of hydrogen. This work are important design factors for the development of an effective micro power generators.