The occurrence and properties of singularities in the equation for the surface density function #sigma# ident to |#DELTA##tool for numericla simulatios of reacting flows,especially when ocmbustion instabilities are encountered.Nevertheless,a difficulty occus in developign subgrid scale models for premixed combustion,becasue the flme front is generally too thin to be resolved on the omputational grid.An approach based on the filtering of the balance quation for the progress variable c using a LES filter larger than the mesh size is propsoed and investigated.Despite its similarities with the field eescription basded on the G-equation,the advantage of this approach is that c and related quantities such as subgrid-scale flame surface density are phsiclly well defined and may be easily extracted from direct numericla simulations (DNS) or expeirmental dat ato analyze and validate models.#p.917-925#QTY##,??e is a minimum time requried for quenching.#p.711-717#QT
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机译：奇数函数＃sigma＃ident to |＃delta ##对响应流的数字函数的奇异性的发生和性质，特别是当遇到OCMBustion不稳定性时，无论如何，临时偶数偶尔均致电 预混合燃烧，因为FLME前面通常太薄才能在换算网格上解析。基于使用大于网格尺寸的LES滤波器的进度变量C的余量Quation过滤的方法是先进和研究。 与基于G方程的现场eescription的相似性，这种方法的优点是C和相关数量，例如子地图级火焰表面密度是pHSICLLY定义的，并且可以容易地从直接NumericLA仿真（DNS）或分析DAT中提取 ATO分析和验证模型。＃p.917-925＃qty ##，e是淬火的最短时间。＃p.711-717＃qt
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