Two-plane two-dimensional Rayleigh thermometry technique for turbulent combustion.

Area of Science:

• Combustion science
• Laser-based diagnostics
• Thermometry

Background:

• Turbulent hydrocarbon flames are crucial in energy applications but complex to study.
• Accurate temperature measurements are vital for understanding flame dynamics and emissions.
• Existing thermometry techniques have limitations in spatial resolution and applicability.

Purpose of the Study:

• To present a novel two-plane, two-dimensional Rayleigh thermometry technique.
• To demonstrate the first-time application of UV Rayleigh thermometry in turbulent flames.
• To highlight the advantages of UV excimer lasers over visible lasers for scattering measurements.

Main Methods:

• Utilizing a two-plane, two-dimensional Rayleigh thermometry approach.
• Employing ultraviolet (UV) Rayleigh scattering with LJY excimer lasers.
• Performing measurements within turbulent hydrocarbon flames.

Main Results:

• Successful implementation of UV Rayleigh thermometry for flame measurements.
• Demonstrated superior signal-to-noise ratio and scattering efficiency with UV lasers.
• Obtained detailed spatial temperature data within the turbulent flame structure.

Conclusions:

• The presented UV Rayleigh thermometry technique is effective for turbulent flames.
• This method provides enhanced capabilities for studying flame reaction zones.
• The technique offers a valuable tool for combustion research and optimization.