Jay B. Jeffries
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View article: A Compact Fiber-Coupled NIR/MIR Laser Absorption Instrument for the Simultaneous Measurement of Gas-Phase Temperature and CO, CO2, and H2O Concentration
A Compact Fiber-Coupled NIR/MIR Laser Absorption Instrument for the Simultaneous Measurement of Gas-Phase Temperature and CO, CO2, and H2O Concentration Open
A fiber-coupled, compact, remotely operated laser absorption instrument is developed for CO, CO2, and H2O measurements in reactive flows at the elevated temperatures and pressures expected in gas turbine combustor test rigs with target pre…
View article: Water film thickness imaging based on time-multiplexed near-infrared absorption
Water film thickness imaging based on time-multiplexed near-infrared absorption Open
We demonstrate the imaging of the thickness of liquid water thin films in the 100-1500 µm range at a constant temperature by monitoring the pixel-by-pixel ratio of absorbance at two near-infrared (NIR) wavelengths near 1400 nm detected wit…
View article: Single-ended mid-infrared laser-absorption sensor for simultaneous in situ measurements of H_2O, CO_2, CO, and temperature in combustion flows
Single-ended mid-infrared laser-absorption sensor for simultaneous in situ measurements of H_2O, CO_2, CO, and temperature in combustion flows Open
The development and demonstration of a four-color single-ended mid-infrared tunable laser-absorption sensor for simultaneous measurements of H2O, CO2, CO, and temperature in combustion flows is described. This sensor operates by transmitti…
View article: Cavity-enhanced absorption spectroscopy with a ps-pulsed UV laser for sensitive, high-speed measurements in a shock tube
Cavity-enhanced absorption spectroscopy with a ps-pulsed UV laser for sensitive, high-speed measurements in a shock tube Open
We report the first application of cavity-enhanced absorption spectroscopy (CEAS) with a ps-pulsed UV laser for sensitive and rapid gaseous species time-history measurements in a transient environment (in this study, a shock tube). The bro…