Experimental investigation of turbulence-chemistry interaction for flame kernel development in a spark-ignition (SI) engine

火花点火（SI）发动机中火焰核心发展的湍流化学相互作用的实验研究

• 批准号: 225906170
• 负责人: Dr. Brian Peterson, Ph.D.
• 金额: --
• 依托单位: School of Engineering
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/225906170?language=en
• 关键词: Experimental; investigation; turbulence; chemistry; interaction

With increasing energy and environmental concerns, there is an evident need to improve fuel economy and reduce emissions from internal combustion (IC) engines. There is an evident need to resolve turbulent-chemistry interactions of developing flame fronts in spark-ignition (SI) engines to better understand and improve combustion performance in IC engines. Advanced laser based diagnostic techniques are at the leading edge of combustion research and provide non-intrusive measurement techniques to resolve multi scalar and vector processes within combustion environments. In particular particle image velocimetry (PIV) and OH planar laser induced fluorescence (PLIF) are among the leading techniques that have been combined to investigate the important turbulence-chemistry coupling with turbulent combustion. Previous findings within open flame configurations have provided notable contributions to the understanding of turbulent-flame interaction, particularly in regards to local flame extinction. Although previous studies have been motivated by applications such as the SI engine, all previous experiments have been limited to open flame environments. To this end, the subject of this proposal is to develop high-speed PIV and OH PLIF techniques to measure flow field and flame front properties that characterize flame development and local flame extinction in an optical SI engine. The proposed measurement campaigns are anticipated to provide notable efforts to improve combustion performance, realize the feasibility of next generation injection and combustion strategies, and provide valuable data set resolving turbulent flame development in SI engines that aid in the development of predictive IC engine simulations used for further combustion and engine development.

随着能源和环境问题的日益严重，显然需要提高燃油经济性并减少内燃机 (IC) 发动机的排放。显然需要解决火花点火（SI）发动机中形成的火焰锋的湍流化学相互作用，以更好地了解和改善内燃机的燃烧性能。基于先进激光的诊断技术处于燃烧研究的前沿，并提供非侵入式测量技术来解决燃烧环境中的多标量和矢量过程。特别是，粒子图像测速 (PIV) 和 OH 平面激光诱导荧光 (PLIF) 是结合起来研究重要的湍流化学与湍流燃烧耦合的领先技术。 先前在明火配置中的发现为理解湍流火焰相互作用，特别是在局部火焰熄灭方面做出了显着贡献。尽管之前的研究是由 SI 发动机等应用推动的，但之前的所有实验都仅限于明火环境。为此，本提案的主题是开发高速 PIV 和 OH PLIF 技术来测量流场和火焰锋特性，以表征光学 SI 发动机中的火焰发展和局部火焰熄灭。预计所提出的测量活动将为提高燃烧性能、实现下一代喷射和燃烧策略的可行性以及提供解决 SI 发动机中湍流火焰发展的有价值的数据集提供显着的努力，从而有助于开发用于进一步燃烧和发动机开发的预测内燃发动机模拟。