High temperature 180 degrees laser-induced fluorescence probe for remote trace radical concentration measurements

Area of Science:

• Chemistry
• Engineering
• Spectroscopy

Background:

• Hydroxyl (OH) radicals are critical intermediates in combustion chemistry.
• Accurate measurement of OH concentrations is essential for understanding and optimizing combustion processes.
• Existing measurement techniques may face limitations in real-world combustion environments.

Purpose of the Study:

• To design and validate a novel optical probe.
• To enable in-situ measurements of parts per million (ppm) level OH concentrations.
• To assess the probe's performance in high-temperature (1100 K) and high-pressure (1 atm) combustion environments.

Main Methods:

• Development of a specialized optical probe system.
• Utilization of spectroscopic techniques for OH detection.
• Calibration and validation procedures under controlled combustion conditions.

Main Results:

• Successful design and construction of the optical probe.
• Demonstration of the probe's capability to measure OH concentrations in the parts per million range.
• Validation of the probe's accuracy and reliability in simulated combustion environments.

Conclusions:

• The developed optical probe is a viable tool for in-situ OH concentration measurements in combustion.
• This technology can provide valuable data for combustion research and engine development.
• Further studies may explore applications in different combustion regimes.