Es wird über Erfahrungen mit verschiedenen numerischen und einem analytischen Verfahren zur Berechnung zeitlicher Reaktionsabläufe in homogenen Gasgemischen berichtet. Die Genauigkeit dieser Verfahren und der Bedarf an Rechenzeiten werden an den Reaktionssystemen Methan/Sauerstoff und Wasserstoff/Luft überprüft. Die diskutierten Verfahren benötigen bei gleicher Genauigkeit Rechenzeiten, die um einen Faktor ca. 30 variieren. Bei den ökonomischeren Verfahren werden spezielle Eigenschaften der Klasse von Differentialgleichungen ausgenutzt, die das behandelte Problem beschreiben.
Abstract. This paper is concerned with the description of a modification of the Patankar/Spalding finite difference procedure that has been applied successfully for prediction of the time-averaged flow variables of an axisymmetric supersonic turbulent freejet diffusion flame. Experimental investigations of this hydrogen/air flame have been carried out by Cohen and Guile. Eddy viscosity models were used to describe the turbulent transport processes. Two models were investigated for the prediction of the combustion process: 1. local chemical equilibrium and 2. steady-state kinetics according to the work of Glassman. The numerical predictions are compared with the experimental results.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.