Modeling Non-premixed, Turbulent Combustion

摘要-莱利这是一项关于湍流、非预混、反应流的模拟研究，重点是与氢气和碳氢化合物扩散火焰在空气中燃烧的模拟有关的问题。所研究的问题包括大涡模拟(LES)对湍流燃烧流动的适用性，以及湍流条件下原子和双原子氢的差异扩散的影响。对大涡火焰面模型的有效性进行了研究，并与实验室数据和高分辨率直接数值模拟结果进行了比较。在雷诺平均(或Favre平均)方程和大涡模拟的背景下，来判断微分扩散模型的有效性。

Abstract - Riley This is a modeling study on turbulent, non-premixed, reacting flows focussing on issues related to the modeling of hydrogen and hydrocarbon diffusion flames burning in air. Issues investigated include the applicability of large-eddy simulations (LES) to turbulent, combusting flows and the influence of differential diffusion of atomic and diatomic hydrogen under turbulent conditions. The validity of large-eddy versions of the flamelet model is studied; comparisons of predictions from LES are made both with laboratory data and with the results of high-resolution, direct numerical simulations. Validity of the modeling of differential diffusion is judged in the context of the Reynolds-averaged (or Favre-averaged) equations and also in the context of the large-eddy simulations.