Computational and Experimental Studies of Turbulent Premixed Flame Kernels

CBET - 0810537 Echekki这一合作的计算-实验工作将研究贫燃料条件下湍流火焰核心中的热扩散不稳定性机制。火焰核是一个重要的基本正则问题，与许多实际应用有关，在这些应用中开发了贫燃燃烧技术以减少排放。由美国领导的计算-基于PI，将基于空间和时间分辨的直接数值模拟（DNS）与化学和运输的现实描述。该实验是基于非侵入式光学诊断方法来成像湍流内核的瞬态演化。这项研究是直接相关的一个新兴的燃烧技术的基础上燃烧贫燃料混合物，以尽量减少污染物的排放，同时保持高度的燃烧效率。项目活动将支持两名初级科学家：一名来自埃及，另一名来自美国项目。计划中的活动将促进美国和埃及研究人员就一个具有全球重要性的主题交流专业知识和想法。该项目得到了美国埃及科学技术联合委员会的支持，该委员会为美国和埃及双方的合作提供资金。

CBET - 0810537 Echekki This collaborative computational-experimental efforts will study the mechanisms thermo-diffusive instabilities in turbulent flame kernels at lean fuel conditions. The flame kernel is an important fundamental canonical problem of relevance to many practical applications where fuel-lean combustion technologies are developed to reduce emissions. The computations, led by the U.S.-based PI, will be based on spatially- and temporally-resolved direct numerical simulations (DNS) with realistic descriptions of chemistry and transport. The experiment is based on non-intrusive optical diagnostic approaches to image the transient evolution of turbulent kernels. This study is directly relevant to an emerging combustion technology based on burning fuel-lean mixtures to minimize pollutants emissions while maintains a high degree of combustion efficiency. The project activities will support two junior scientists: one from Egypt and the other from the US program. The planned activities will promote the exchange of expertise and ideas among the U.S. and Egyptian researchers on a topic of global importance. This project is supported by the U.S. Egypt Joint Board for Science and Technology, which is funding both the U.S. and Egyptian sides of the collaboration.