Chemical-Kinetic Characterization of Ignition of Fuels

CTS-990631 KANGANASUNDARAM SESHADRI 加州大学圣迭戈分校这是一项关于碳氢燃料在非预混系统中自燃的物理和化学机理的研究。 重点是“高级”碳氢化合物，特别是正庚烷、异辛烷、正癸烷、正十二烷和甲苯。 实验是在一个逆流的配置进行，加热的氧化剂从管道喷射流对燃料从液体池的表面蒸发。 测量了氧化剂流的温度作为点火时应变速率的函数. 各种稳定物种的浓度分布，温度分布，并在非常接近自燃的条件下的速度分布进行了测量。 使用详细的和减少化学的数值计算和自燃的临界参数进行计算，并与实验进行比较。 率比渐近分析使用减少化学机制进行。 得到了预测燃料自燃的简单解析公式。 数值和分析计算进行合作，教授诺伯特彼得斯在研究所f？r Technische Mechanik，RWTH亚琛，德国。

CTS-990631KALYANASUNDARAM SESHADRI U OF CAL SAN DIEGOThis is a study of the physical and chemical mechanisms of autoignition of hydrocarbon fuels in nonpremixed systems. The focus is "higher" hydrocarbons, specifically n-heptane, iso-octane, n-decane, n-dodecane and toluene. Experiments are conducted in a counterflow configuration; heated oxidizer injected from a duct flows against fuel evaporating from the surface of a liquid pool. The temperature the oxidizer stream as a function of the strain rate at ignition is measured. Concentration profiles of various stable species, the temperature profile, and the velocity profile at conditions very close to autoignition are measured. Numerical calculations using detailed and reduced chemistry are performed and critical parameters for autoignition are calculated and compared with experiments. Rate-ratio asymptotic analyses using reduced chemical mechanisms are performed. Simple analytical formulae are obtained for predicting autoignition for the fuels. Numerical and analytical computations are performed in collaboration with Professor Norbert Peters at the Institut f?r Technische Mechanik, RWTH Aachen, Germany.