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Simulation of flame surface density and burning rate of a premixed turbulent flame using contour advection

机译:利用轮廓对流模拟预混湍流火焰的火焰表面密度和燃烧速率

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摘要

In this paper, a 2-dimensional rod-stabilized V-shaped flame is simulated using contour advection with surgery as well as the random vortex method. Effects of turbulence on various quantities, such as flame brush thickness and flame surface density, are investigated. The flame surface density Σ is estimated using the Bray-Moss-Libby formulation, which involves the use of a mean orientation factor σ_c. As a comparison, values of Σ are also obtained using Shepherd's model, which employs the values of mean flame surface area and mean flame length. Local flame structure is characterized in terms of turbulent flame brush, orientation factor, and flame surface density. Profiles of Σ obtained using the two different models are compared and show that discrepancy is more evident with increasing turbulence intensity.
机译:在本文中,使用轮廓平流和外科手术以及随机涡旋方法模拟了二维杆稳定的V形火焰。研究了湍流对各种量的影响,例如火焰刷的厚度和火焰表面密度。火焰表面密度Σ是使用Bray-Moss-Libby公式估算的,该公式涉及平均取向因子σ_c的使用。作为比较,还使用Shepherd模型获得了Σ值,该模型采用了平均火焰表面积和平均火焰长度值。局部火焰结构的特征在于湍流的火焰刷,取向因子和火焰表面密度。比较了使用两种不同模型获得的Σ曲线,结果表明,随着湍流强度的增加,差异更加明显。

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