Transient measurements using thermographic phosphors

Area of Science:

• Thermophysical Measurement
• Materials Science
• Engineering Applications

Background:

• Thermographic phosphors are widely used for temperature measurement.
• Current methods assume constant temperature during phosphor decay, limiting use in dynamic scenarios.
• Rapid temperature changes can invalidate traditional phosphor-based measurements.

Purpose of the Study:

• To present a novel data reduction model for thermographic phosphors.
• To incorporate transient effects into phosphor temperature measurements.
• To evaluate the efficacy of the new model in dynamic environments.

Main Methods:

• Development of a new data reduction model for phosphor decay.
• Implementation of a heated wire experiment to simulate transient conditions.
• Comparison of results from the transient model against a traditional steady-state model.

Main Results:

• The transient model can resolve temperature changes during rapid heating.
• Accuracy of transient resolution was limited for the tested microsecond phosphor.
• The steady-state model showed a significant temperature discrepancy (10°C) under high heating compared to the transient model.

Conclusions:

• The developed transient model offers improved temperature measurement accuracy in dynamic engineering applications.
• While resolution accuracy needs further enhancement, the transient model demonstrates superior performance over steady-state methods during rapid heating events.
• This work highlights the importance of considering thermal transients in phosphor thermometry.