Engineering Research Equipment Grant: Pulsed Dye Laser Upgrade for Gas-Solid and Turbulent Flame Diagnostics

叙述：康奈尔大学目前提供的脉冲激光系统 （Quanta-Ray DCR-2）升级为包括三次谐波 发生器、染料振荡器/放大器和倍频晶体。 由此产生的可调谐相干光脉冲使 测量（1）稠密气固流中的速度和（2） 预混反应区自由基浓度 汹涌的火焰 在稠密气固两相流中，脉冲染料激光器使颗粒 以及使用光纤飞行时间测量气体速度 风速计探头 在探针尖端，激光诱导- 检测磷光以推断示踪气体的速度，或者 特殊涂层颗粒。 这一新的诊断将提供 流化床内气固两相流流型的详细资料 床 在预混湍流火焰燃烧中，自由基的荧光 由可调谐染料激光器诱导的物种提供了关于 紧张的火焰结构。

Narrative: A pulsed laser system presently available at Cornell (Quanta-Ray DCR-2) is upgraded to include a third harmonic generator, a dye oscillator/amplifier, and a doubling crystal. The resulting pulses of tunable coherent light enable measurements of (1) velocities in dense gas-solid flows and (2) radical species concentrations in the reaction zone of premixed turbulent flames. In dense gas-solid flows, the pulsed dye laser enables particle and gas velocity measurements using a fiber-optic time-of-flight anemometer probe. At the probe tip, laser-induced- phosphorescence is detected to infer velocity of a tracer gas or specially coated particles. This new diagnostic will provide detailed information on gas-solid flow patterns in fluidized beds. In premixed turbulent flame combustion, fluorescence of radical species induced by the tunable dye laser provides unique data on the structure of strained flamelets.