Modelling of Turbulent Spray Flames with Variable Degrees of Fuel Pre-Evaporation

具有不同程度的燃料预蒸发的湍流喷雾火焰的建模

• 批准号: 158600480
• 负责人: Professor Dr. Andreas Kronenburg
• 金额: --
• 依托单位: Institut für Technische Verbrennung (ITV)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/158600480?language=en
• 关键词: Modelling; Turbulent; Spray; Flames; Variable

During the first funding period, we developed novel closures that account for the unresolved (sub-grid) interactions between spray evaporation and turbulence and between evaporation and combustion. The modelling is based on large-eddy simulations (LES) coupled with a conditional moment closure (CMC) method for the modelling of the combustion process. The predictions of non-reacting spray jets and spray flames with significant pre-evaporation of the fuel are very good. A reduction of the amount of the pre-evaporated fuel, however, leads to partially premixed combustion if the gaseous mixture in the jet is within the flammability limits. The partially premixed combustion cannot satisfactorily be described by LES-CMC in its current implementation. We now suggest several approaches for the modelling of a wide range of spray flames with variable degrees of pre-evaporation. The approaches are based on different definitions of an additional progress variable that ensure the accurate modelling of non-premixed, partially premixed and -to a certain degree- premixed flames.

在第一个资助期间，我们开发了新的封闭，占喷雾蒸发和湍流之间的未解决的（子网格）的相互作用和蒸发和燃烧之间。建模是基于大涡模拟（LES）加上条件矩封闭（CMC）的燃烧过程建模方法。非反应喷雾射流和喷雾火焰与显着的预蒸发的燃料是非常好的预测。然而，如果射流中的气体混合物在可燃极限内，则预蒸发燃料量的减少导致部分预混合燃烧。部分预混燃烧不能令人满意地描述LES-CMC在其目前的实施。现在，我们提出了几种方法来模拟各种不同程度的预蒸发喷雾火焰。该方法是基于一个额外的进展变量，确保准确的建模非预混，部分预混和-在一定程度上-预混火焰的不同定义。

项目成果

Simulation of Dilute Acetone Spray Flames with LES-CMC Using Two Conditional Moments

使用 LES-CMC 使用两个条件矩模拟稀丙酮喷雾火焰

• DOI: 10.1007/s10494-014-9565-1
• 发表时间: 2014
• 期刊: Flow, Turbulence and Combustion
• 作者: Kronenburg;Stein O.T.
• 通讯作者: Stein O.T.

Certain Aspects of Conditional Moment Closure for Spray Flame Modelling

喷雾火焰建模的条件矩闭合的某些方面

• DOI: 10.1007/978-3-319-10810-0_23
• 发表时间: 2015
• 作者: Kronenburg;Stein O.T.
• 通讯作者: Stein O.T.

Imaging measurements and LES-CMC modeling of a partially-premixed turbulent dimethyl ether/air jet flame

• DOI: 10.1016/j.proci.2014.06.042
• 发表时间: 2015
• 作者: B. Coriton;Masoomeh Zendehdel;S. Ukai;A. Kronenburg;O. Stein;S. Im;M. Gamba;Jonathan H. Frank

Large eddy simulation of dilute acetone spray flames using CMC coupled with tabulated chemistry

• DOI: 10.1016/j.proci.2014.06.013
• 发表时间: 2015-01-01
• 期刊: PROCEEDINGS OF THE COMBUSTION INSTITUTE
• 影响因子: 3.4
• 作者: Ukai, S.;Kronenburg, A.;Stein, O. T.
• 通讯作者: Stein, O. T.