Numerical Studies of Turbulence-Combustion Interactions in Diffusion Planes

扩散平面中湍流-燃烧相互作用的数值研究

• 批准号: 8709465
• 负责人: Ahmed Ghoniem
• 金额: $ 14.14万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-09-01 至 1990-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8709465&HistoricalAwards=false
• 关键词: Numerical; Studies; Turbulence; Combustion; Interactions

The method of "random vortices" is used to describe the generation and later behavior of turbulence in a chemically reacting flow. This method avoids the steady state assumption which weakens existing models of turbulence. Although it has some limitations, it is one of the most promising steps forward in the numerical analysis of reacting flow fields. An extensive range of Reynolds and Peclet numbers will be tested in various configurations, with a view to identify and predict such critical phenomena as stability, extinction, flame stretch, swirl effect, etc... As the field stands today, large sets of experimental data are waiting to be used for the verification of such improved comprehensive numerical models. The availability of a reliable predictive model in turbulent reacting flow fields has been an elusive goal to the combustion community. During the last twenty years a number of simplified numerical models have been tried but with little generic success. This new method introduces vorticity as a fundamental aspect of turbulence generation; in earlier times insufficient computer performance had ruled out this important refinement. Success in the development of this program would open the way for computer codes of increased flexibility and generality.

本文采用“随机涡”的方法来描述 湍流的产生和后来的行为， 反应流。 该方法避免了稳态假设 这削弱了现有的湍流模型。 虽然它有一些 限制，这是向前迈出的最有希望的一步， 反应流场的数值分析。 一个广泛 雷诺数和Peclet数的范围将在不同的 配置，以确定和预测这种关键的 稳定性、熄灭、火焰拉伸、涡流效应、 等等 就目前的情况来看， 数据正在等待用于验证这种改进的 综合数值模型 湍流中可靠预报模式的可用性 反应流场一直是燃烧的一个难以捉摸的目标 社区 在过去的二十年里，一些简化的 数值模型已经尝试过，但几乎没有通用的 成功 这种新方法引入了涡度作为基本的 湍流生成方面;在早期， 计算机性能已经排除了这种重要的改进。 该计划的成功开发将为以下方面开辟道路： 增加了灵活性和通用性的计算机代码。