分形在汽油机准维燃烧模型中的应用研究

Application of the Fractal on a Quasi-dimensional Turbulent Combustion Model to SI Engines

针对汽油机的准维湍流燃烧模型进行了发展研究,将分形表示的湍流燃烧速度并入燃烧模型。研究表明:分形是一种模拟燃烧过程的有效手段,通过对分形中低端转捩尺度的选取分析,得出Gibson尺度比Kolmogorov尺度更适合作为低端转捩尺度。

In this paper,a quasi-dimensional turbulent combustion model for SI engines was thoroughly studied. The fractal expression of the turbulent flame speed was incorporated into the combustion model. The research reveals that the Gibson scale is more applicable than the Kolmogorov scale. As a phenomenal description of combustion process, the fractal is also an effective tool.