Effect of Stretch and Curvature on the Structure, Extinction, and Emissions of 2-D Partially Premixed Flames

CTS-9319323 PITZ提出了一个非常雄心勃勃的实验计划，利用非侵入式激光诊断技术来研究拉伸和火焰曲率对二维层流部分预混火焰结构和熄灭的影响。这项工作将与耶鲁大学的米奇·斯穆克教授合作进行，他将负责这些火焰的数值模拟；后者的工作将得到天然气研究所的支持。将研究三种火焰形态：(1)没有火焰曲率的轴对称逆流火焰，(2)纯曲率的柱形火焰，(3)同时经历拉伸和曲率的同流轴对称射流。通过在甲烷燃料中添加H2和CO或向燃料或空气中添加CO2等红外辐射气体来研究气体重整和辐射对结构和排放的影响。这项实验研究的目的是建立一个拉伸的圆柱火焰和拉伸的同向流动火焰的火焰库，以输入到实际燃烧室中发现的更复杂的过渡和湍流火焰模型中。

ABSTRACT -- CTS-9319323 Pitz The PI has proposed a very ambitious experimental program to use non-intrusive laser diagnostic techniques to investigate the effects of stretch and flame curvature on the structure and extinction of 2D laminar partially premixed flames. This will be carried out in collaboration with Prof. Mitch Smooke of Yale University who will be concerned with the numerical modeling of these flames; this latter effort will be supported by the Gas Research Institute. Three flame configurations will be investigated: (1) an axisymmetric opposed flow flame in the absence of flame curvature, (2) a cylindrical flame undergoing pure curvature, and (3) a co-flowing axisymmetric jet undergoing both stretch and curvature. Effects of gas reformation and radiation on the structure and emissions will be studied by adding H2 and CO to the methane fuel or infrared radiating gases such as CO2 to the fuel or air. The objective of this experimental investigation is to produce a flamelet library of stretched cylindrical and stretched co-flowing flames for input to more complex transitional and turbulent flamelet models found in practical combustors.