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Published on: August 6, 2018
A High-Performance Ultraviolet Optical Sensing System for Rotating Detonation Extreme Combustion
Wen Dai1, Yingchen Shi1, Junhui Ma2
1School of Aerospace Engineering, Tsinghua University, Beijing 100084, China.
Sensors (Basel, Switzerland)
|May 27, 2026
Summary
A new ultraviolet optical sensing system (HUOSS) enables megahertz imaging for extreme combustion, capturing fine detonation wave structures and multi-spectral chemiluminescence. This breakthrough aids advanced propulsion research by visualizing ultra-transient processes.
Area of Science:
- Combustion physics and diagnostics
- Optical sensing systems
- Advanced propulsion
Background:
- Extreme combustion is characterized by unsteadiness, heterogeneity, and multi-physics coupling, crucial for advanced propulsion.
- High-performance sensing is vital for understanding extreme combustion but faces challenges in multi-spectral observation, high-frequency imaging, and photoelectric enhancement.
- Existing methods struggle with the demands of ultra-transient processes and complex spectral characteristics.
Purpose of the Study:
- To develop a high-performance ultraviolet optical sensing system (HUOSS) capable of addressing the challenges of extreme combustion sensing.
- To validate the system's capabilities in multi-spectral observation, ultra-high-speed imaging, and high signal-to-noise ratio detection.
- To apply the HUOSS to analyze the chemiluminescence of a hydrogen/ammonia-air rotating detonation.
Main Methods:
- Development of the HUOSS with megahertz-level imaging at 1608 × 1104 resolution and 10^7 electron gain in the ultraviolet band.
- Application of HUOSS to chemiluminescence sensing of hydrogen/ammonia-air rotating detonation.
- Analysis of influencing factors like bandpass filter transmission and intensifier gate width; simultaneous OH* and NH* multi-spectral observation.
Main Results:
- The HUOSS successfully captured fine structures and evolution of detonation waves, demonstrating high-speed imaging capabilities.
- Simultaneous multi-spectral observation of OH* and NH* was achieved, allowing analysis of ammonia addition effects.
- Filter transmission loss and its impact on gate width settings were revealed, validating the system's diagnostic capacity.
Conclusions:
- The developed HUOSS is an effective diagnostic tool for extreme transient combustion research.
- The system comprehensively verifies multi-spectral, extremely transient, and high signal-to-noise ratio sensing capabilities.
- This technology advances the understanding of physical mechanisms in advanced propulsion systems.
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