Detailed Chemistry of OH, C2, and CH in Rich Hydrocarbon Flames

本研究的目的是确定产生和消耗羟基、碳二聚体和碳氢化合物自由基的主要过程，以及导致这些物质化学发光的化学过程，并在可能的情况下确定参与反应的动力学速率常数。将建立一系列合适的富含乙炔/氧/氮的火焰，这些火焰燃烧稳定，化学计量范围广，温度范围约为1800至2500K。测量程序将包括表征平面火焰燃烧器上方的层流，一维燃烧气体流动。每个测量参数将沿着热气体剖面的几个点进行监测，对应于距离反应区0.25至5.0 ms的时间。激光诱导荧光将用于监测OH， C2和ch浓度变化，Na/Li测量将用于h原子浓度。OH， C2和CH的化学发光将沿着每条火焰轮廓不发射。火焰温度将通过钠线反转法测量。

The objectives of this research are the identification of the dominant processes producing and consuming hydroxyl, carbon dimer, and hydrocarbon radical and the chemistry leading to the chemiluminescence of these species and determination of kinetic rate constants, where possible, for the participating reactions. A suitable series of rich acetylene/oxygen/nitrogen flames which burn stably and cover a wide range of stoichiometries with temperatures ranging from about 1800 to 2500K will be established. The measurement program will consist of characterizing the laminar, one-dimensional burnt-gas flows above a flat flame burner. Each measured parameter will be monitored at several points along the hot gasprofiles corresponding to times of 0.25 to 5.0 ms from the reaction zone. Laser-induced fluorescence will be employed to monitor OH, C2, and CHconcentration variatons, and Na/Li measurements will be made for H-atomconcentrations. Chemiluminescence of OH, C2, and CH will be followed inemission along each flame profile. Flame temperatures will be measured by the sodium line-reversal method.