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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >MODELS EVALUATIONS OF COMBUSTION PROCESS IN A CYLINDRICAL FURNACE
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MODELS EVALUATIONS OF COMBUSTION PROCESS IN A CYLINDRICAL FURNACE

机译：圆柱炉燃烧过程的模型评估

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摘要

In this work an evaluation of different combustion models for predicting oxygen enriched combustion processes was performed. Two types of models were selected. The first one was a generalized finite rate model, in which the conservation equation for the mass concentration was solved, for all species present in the process. In this modeling approach, three different reaction rate expressions were considered. The second case was based on the PDF formulation, which consisted in solving the conservation equations for the mass fraction and its variance. In this second approach the species distributions were determined by assuming two different shapes for the probability density functions. The mass, momentum, energy and species or mass fraction conservation equations were numerically solved by a finite volume formulation. The two-equation k-ε turbulence model was selected for solving the turbulent problem. Radiation was taken into account by the discrete transfer radiation model. After solution, the temperature and species concentration fields were compared with available experimental data. Although the PDF formulation involved the solution of a smaller number of equations, therefore consuming less computer time, the performance of the generalized finite rate model was superior in the present test cases.
机译：在这项工作中，对用于预测富氧燃烧过程的不同燃烧模型进行了评估。选择了两种类型的模型。第一个是广义有限速率模型，其中解决了过程中存在的所有物种的质量浓度守恒方程。在这种建模方法中，考虑了三种不同的反应速率表达式。第二种情况基于PDF公式，该公式包括求解质量分数及其方差的守恒方程。在第二种方法中，通过为概率密度函数假设两个不同的形状来确定物种分布。质量，动量，能量和种类或质量分数守恒方程通过有限体积公式进行数值求解。选择二方程k-ε湍流模型来求解湍流问题。离散转移辐射模型考虑了辐射。溶解后，将温度和物种浓度场与可用的实验数据进行比较。尽管PDF公式涉及较少数量方程的求解，因此消耗了较少的计算机时间，但在当前测试案例中，广义有限速率模型的性能优越。

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