Soot Morphology in Flickering Laminar Diffusion Flames

由PI开发的热泳取样与电子显微镜相结合的技术已被广泛应用于稳定火焰中，以帮助阐明碳烟生长和氧化的机理。这项拟议的研究的目的是证明潜热采样技术可以应用于强迫闪烁火焰。由于闪烁火焰的时变性质，应用潜热采样技术具有一定程度的高风险，使这项提议成为SGER计划的理想候选者。PI希望优化强制频率和探测时间，以便从这些强制闪烁的火焰中收集有意义的煤烟样本。如果确实可以证明这一点，为什么闪烁的火焰与类似的稳定火焰相比，似乎形成了更多的碳烟，这个问题的解决方案应该更接近于解决方案。这对于理解湍流燃烧中碳烟的形成具有重要意义，因为闪烁火焰被认为是层流火焰和湍流火焰之间的桥梁。

The technique of thermophoretic sampling coupled with electron microscopy, as developed by the PI, has been extensively used in steady flames to help elucidate the mechanisms of soot growth and oxidation. The objective of this proposed research is to demonstrate that the technique of thermophoretic sampling can be applied to forced flickering flames. Because of the time varying nature of flickering flames, application of the thermophoretic sampling technique takes on a degree of high risk, making this proposal an ideal candidate for the SGER program. The PI hopes to optimize both the forcing frequency and probing time so that meaningful soot samples can be collected from these forced flickering flames. If this indeed can be shown to be the case, the resolution to the question of why flickering flames appear to form significantly greater quantities of soot as compared to similar steady flames should be closer to a solution. This could be significant in the understanding of soot formation in turbulent combustion since flickering flames are viewed to bridge the gap between laminar and turbulent flames.