A Strategy to Obtain an Universal Scaling Law of Flames beyond Flame-sheet Concept

Abstract

   This paper proposes the strategy or methodology how to achieve a scaling of flames; that is, the law to attain the ratio of flame size to flame thickness remains as constant in variety size of flame (thus, a larger flame has thicker flame zone while a smaller flame has thinner flame zone, yet the overall geometric similarity is sustained). Considering simple analysis the possible strategy to fulfill this requirement is discussed. It turns out that the combination with low-gravity and dilution would be key factors to attain the geometric similarity of the flame including its structure. We will verify this issue in future by means of low-gravity test facility (experimental approach) and numerical simulation with multi-step kinetics model (numerical approach).