Supersonic reacting flow simulations using reduced chemical kinetic mechanisms and multiprocessor ISAT

Document Type

Conference Proceeding

Publication Date

1-1-2008

Abstract

Quasi-steady state (QSS) reduced mechanisms based on the latest detailed kinetics have been shown to give good agreement with detailed chemistry over a wide range of conditions using many fewer species. Using In-Situ Adaptive Tabulation (ISAT) the mechanisms run in a reasonable time for use in CFD simulations. The URan multiprocessor ISAT algorithm is demonstrated in the VULCAN CFD code. The effects of error tolerance and reduced mechanism size on URan ISAT speedup compared to direct source term evaluation are compared. The benefits of the URan approach increase with tighter error tolerances and larger mechanisms. An important first step in creating a QSS reduced mechanism is eliminating unimportant species and reactions from the detailed mechanism to create a "skeletal" mechanism. Skeletal mechanisms are compared to detailed chemistry for combustion of large hydrocarbons for ignition delay and counterflow diffusion flame extinction strain rate. The combination of ISAT and optimized reduced mechanisms based on the best available detailed chemical kinetic mechanisms is a feasible and promising method of improving the realism of combustion chemistry in reacting flow CFD simulations. Copyright © 2008 by Reaction Engineering International.

Identifier

78149460975 (Scopus)

ISBN

[9781563479373]

Publication Title

46th AIAA Aerospace Sciences Meeting and Exhibit

External Full Text Location

https://doi.org/10.2514/6.2008-1014

This document is currently not available here.

Share

COinS