Influence of Auto-Ignition on the Driving Mechanisms Leading to High Frequency Combustion Instabilities in Premixed Turbulent Flames

自燃对预混湍流火焰高频燃烧不稳定性驱动机制的影响

• 批准号: 414909282
• 负责人: Professor Dr.-Ing. Thomas Sattelmayer
• 金额: --
• 依托单位: Lehrstuhl für Thermodynamik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/414909282?language=en
• 关键词: Influence; Auto; Ignition; Driving; Mechanisms

Before the full potential of two-stage lean reheat combustion for further reduction of pollutant emissions can be exploited, suitable strategies for avoiding high frequency (HF) combustion instabilities in such combustion systems must be developed. In this context the challenge for basic research is to identify the mechanisms leading to loss of stability and to close the current gap in modelling of HF-instabilities by providing the missing models on acoustic flame feedback and effective stability analysis methods. The proposed research aims at providing data from a novel test facility of unique acoustic design, which has been particularly designed for HF instability research of (partially) auto-ignition stabilized flames. This platform has been successfully commissioned so far and it is operational for being used in the proposed project for the first time. The experimental data will be employed for the further development of simulation methods and in particular for the derivation flame dynamics models suited for stability analyses with linear modelling frameworks.

在可以利用两阶段的重新加热以进一步减少污染物排放的全部潜力之前，必须制定此类燃烧系统中避免高频（HF）燃烧不稳定性的合适策略。在这种情况下，基础研究的挑战是确定导致稳定性丧失的机制，并通过在声学反馈和有效的稳定性分析方法上提供缺失的模型来缩小HF不含义的当前差距。拟议的研究旨在从独特的声学设计的新型测试设施中提供数据，该研究专门针对（部分）自动点击稳定火焰的HF不稳定性研究。该平台已于迄今已成功进行了委托，并且该平台首次在拟议项目中使用。实验数据将用于进一步开发仿真方法，尤其是针对适用于使用线性建模框架稳定性分析的派生火焰动力学模型。