Computational Economy Improvements in PRISM.

Tonse, S. R. ; Brown, N. J.

Technical Information Center Oak Ridge Tennessee

关键词: Chemical kinetics;    Computational fluid dynamics;    Combustion;    Polynomials;    Computerized simulation;   

RP-ID  :  DE2004823936

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The PRISM piecewise solution mapping procedure, in which the solution of the chemical kinetic ODE system is parameterized with quadratic polynomials, is applied to CFD simulations of H(sub 2)+air combustion. Initial cost of polynomial construction is expensive, but it is recouped as the polynomial is reused. We present two methods that help us to parameterize only in places that will ultimately have high reuse. We also implement non-orthogonal Gosset factorial designs, that reduce polynomial construction costs by a factor of two over previously used orthogonal factorial designs.