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.

在充分挖掘两级稀薄再热燃烧进一步减少污染物排放的潜力之前，必须制定适当的策略来避免此类燃烧系统中的高频燃烧不稳定性。在这种背景下，基础研究的挑战是确定导致稳定性丧失的机制，并通过提供关于声学火焰反馈的缺失模型和有效的稳定性分析方法来弥补目前在高频不稳定性建模方面的差距。这项研究旨在提供一种声学设计独特的新型测试设备的数据，该设备是专门为研究(部分)自燃稳定火焰的高频不稳定性而设计的。到目前为止，该平台已成功投入使用，并已投入运营，首次用于拟议的项目。实验数据将用于进一步开发模拟方法，特别是用于推导适用于线性建模框架稳定性分析的火焰动力学模型。