Numerical Modeling of the Turbulent Spark Ignition Dynamics of Gasoline Surrogates at Fuel-Lean, High Pressure, High Temperature Conditions

贫燃料、高压、高温条件下汽油替代物湍流火花点火动力学的数值模拟

• 批准号: 387641749
• 负责人: Professor Dr. Ulrich Maas
• 金额: --
• 依托单位: Department of Mechanical Engeneering
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/387641749?language=en
• 关键词: Numerical; Modeling; Turbulent; Spark; Ignition

The scientific aim of this research project is to numerically model turbulent spark ignition mechanisms of gasoline surrogates (i.e. iso-octane, n-heptane, toluene). The focus is on fuel-lean, high pressure, high temperature conditions as relevant to spark ignition (SI) engine operation conditions, and on spark energies near the minimum ignition energy (MIE), in near-isotropic turbulence over a wide range of values of turbulence intensity and laminar burning velocity. The resulting knowledge will help understanding the slow burning, misfire, and partial burn cycles frequently observed in SI engines operated at fuel-lean conditions. The project will be based on a hierarchical modeling concept with different ingredients: detailed numerical simulations, a reduction methodology for the complexity of the chemical kinetics, and a statistical approach for the turbulence-chemistry interaction.This proposal is imbedded in the call for joint projects (MOST-DFG Joint Research Projects). The Taiwanese partner (Prof. S. Shy, National Central University) will perform experimental investigations of the ignition of gasoline surrogates.

该研究项目的科学目的是在数值上对汽油替代物的湍流火花点火机制（即iso-octane，n-Heptane，甲苯）进行建模。重点是燃油液，高压，高温条件与火花点火（SI）发动机操作条件相关，以及在最小点火能量（MIE）附近的火花能量，在近异构湍流中，在湍流强度和层状燃烧速度的广泛范围内。最终的知识将有助于理解在燃油叶子条件下运行的SI发动机中经常观察到的缓慢燃烧，失火和部分燃烧周期。该项目将基于具有不同成分的层次建模概念：详细的数值模拟，用于化学动力学复杂性的降低方法以及用于湍流化学相互作用的统计方法。此提案在关节项目的呼吁中嵌入了该提案（大多数DFG联合研究项目）。台湾合伙人（国家中央大学S. Shy教授）将对汽油代理人的点火进行实验调查。