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首页> 外文会议>IUTAM Symposium on Turbulent Mixing and Combustion, Jun 3-6, 2001, Kingston, Ontario, Canada >INFLUENCE OF DIFFERENTIAL DIFFUSION ON LOCAL EQUILIBRIUM AND SUPER-EQUILIBRIUM COMBUSTION IN TURBULENT NON-PREMIXED FLAMES
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INFLUENCE OF DIFFERENTIAL DIFFUSION ON LOCAL EQUILIBRIUM AND SUPER-EQUILIBRIUM COMBUSTION IN TURBULENT NON-PREMIXED FLAMES

机译：扩散对湍流非半球形火焰局部平衡和超平衡燃烧的影响

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摘要

Turbulent combustion can lead to very specific phenomena. One of them is called super-equilibrium combustion. In many applications, authors have indeed seen temperatures higher than those obtained by thermodynamic equilibrium. In the present work, this effect is studied for diluted hydrogen/air flames using DNS computations taking into account differential diffusion. The results show that transport phenomena lead to local accumulations of reactants or dilutants. These changes in the relative composition of the mixture induce large modifications of its thermodynamic properties. It becomes therefore possible to obtain temperatures higher than those computed by neglecting these modifications of the locaf dilution rate.
机译：湍流燃烧会导致非常特殊的现象。其中之一称为超平衡燃烧。在许多应用中，作者的确确实看到温度高于通过热力学平衡获得的温度。在目前的工作中，使用DNS计算并考虑了微分扩散，研究了稀释氢气/空气火焰的这种影响。结果表明，运输现象导致反应物或稀释剂的局部积累。混合物相对组成的这些变化引起了其热力学性质的大幅改变。因此，有可能获得高于通过忽略蝗虫稀释率的这些改变而计算出的温度的温度。

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