On autoignition-dominated supersonic combustion

Abstract

Supersonic combustion in hydrocarbon-fueled scramjets, in the lower limits of hypersonic flight Mach numbers, is expected to occur as autoignition-dominated distributed reactions. At relevant conditions, including leading to autoignition is not well-captured by detailed chemical-kinetic models at present. This paper introduces an evolution-variable manifold (EVM) framework for modeling autoignition-dominated distributed reactions in both compressible and incompressible flows. This framework combines a data-driven model for induction with a Lagrangian-reactor-generated (discretized) state-space manifold method for post-ignition combustion. As a first-order validation, EVM captures the temperature evolution in a rapidly-mixing well-stirred reactor (WSR).

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