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Related Experiment Video

Updated: Jun 12, 2026

Flame Experiments at the Advanced Light Source: New Insights into Soot Formation Processes

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Laser-induced fluorescence in high pressure solid propellant flames.

T Edwards, D P Weaver, D H Campbell

|May 22, 2010

Summary

This summary is machine-generated.

Laser-induced fluorescence (LIF) successfully mapped OH and CN radicals in high-pressure solid propellant flames. Overcoming signal scattering was key to analyzing these reactive species under extreme conditions.

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Area of Science:

Combustion Science
Spectroscopy
Chemical Physics

Background:

Solid propellants are crucial energetic materials.
Understanding their combustion behavior at high pressures is vital for performance and safety.
In-situ diagnostics are needed to probe flame chemistry.

Purpose of the Study:

To apply laser-induced fluorescence (LIF) for studying high-pressure solid propellant flames.
To determine the spatial distribution of OH and CN radicals.
To assess the feasibility of LIF for diagnostics in optically thick flames.

Main Methods:

Utilized laser-induced fluorescence (LIF) spectroscopy.
Investigated solid propellant flames at pressures up to 3.5 MPa.
Attempted Raman spectroscopy with 308-nm excitation.

Main Results:

Successfully mapped the distribution of OH and CN radicals in solid propellant flames.
Identified significant challenges in separating LIF signals from strong flame scattering.
Raman experiments were hindered by interfering LIF signals from OH and NH radicals.

Conclusions:

LIF is a viable technique for probing radical distributions in high-pressure solid propellant flames.
Signal scattering and interfering fluorescence are major challenges requiring advanced mitigation strategies.
Further development is needed for successful application of Raman spectroscopy in these environments.