B. Yang et Sb. Pope, TREATING CHEMISTRY IN COMBUSTION WITH DETAILED MECHANISMS - IN-SITU ADAPTIVE TABULATION IN PRINCIPAL DIRECTIONS PREMIXED COMBUSTION, Combustion and flame, 112(1-2), 1998, pp. 85-112
A new method to treat chemical reactions in combustion problems with d
etailed mechanisms is developed. The method is called in situ adaptive
tabulation in principal directions (ISATPD). The tabulation is done i
n situ during combustion calculations and is made in the first few pri
ncipal directions of the composition space. The integration of the gov
erning equations of chemical reactions is made using detailed mechanis
ms. Test calculations of the premixed pairwise mixing stirred reactor
(PPMSR) are performed for methane/air combustion with a skeletal mecha
nism consisting of 16 species and 40 reactions, and for natural gas co
mbustion with the GRI 2.11 mechanism consisting of 49 species and 279
reactions. Results show that this method has excellent accuracy (for a
ll species) and efficiency. A speedup in performing chemistry of 1,665
is obtained for the methane/air combustion system with the skeletal m
echanism. The speedup will increase as the calculation continues since
less integrations will be performed. (C) 1998 by The Combustion Insti
tute.