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Simultaneous thermal camouflage and radiative cooling for ultrahigh-temperature objects using inversely designed
Saichao Dang1,2, Wei Yang1, Jialei Zhang1
1Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, People's Republic of China.
Nanophotonics (Berlin, Germany)
|December 5, 2024
Summary
This study introduces a material-informatics framework for designing ultrahigh-temperature objects with simultaneous thermal camouflage and radiative cooling. The novel structures significantly reduce infrared signals and enhance thermal management for improved object viability.
Area of Science:
- Materials Science and Engineering
- Nanotechnology
- Thermal Management
Background:
- Infrared detection technology poses a threat to ultrahigh-temperature objects by capturing thermal radiation.
- Wien's displacement law highlights the significance of the 3-5 μm range for high-temperature objects.
- Effective heat management is critical for the operational viability of ultrahot entities.
Purpose of the Study:
- To develop a material-informatics-based framework for inverse design of thermal camouflage and radiative cooling.
- To tailor spectral properties for ultrahigh-temperature objects, focusing on low emittance in the 3-5 μm range and high emittance in the 5-8 μm range.
- To enhance the survival and operational consistency of objects operating at extreme temperatures.
Main Methods:
- Utilized a database of high-temperature resistant materials.
- Employed a material-informatics framework for inverse design.
- Applied the transfer matrix method for spectral property calculation and particle swarm optimization for structure optimization.
Main Results:
- Two optimized multilayer structures achieved simultaneous thermal camouflage and radiative cooling for ultrahigh-temperature objects.
- Demonstrated significant infrared signal reduction (up to 86.7%) at temperatures up to 500°C.
- Showcased enhanced radiative cooling, with temperature reductions of 29.4°C and 57.5°C compared to aluminum under specific heating power densities.
Conclusions:
- The developed framework enables the design of materials for effective infrared signal attenuation and thermal management.
- The optimized structures offer a viable solution for protecting ultrahigh-temperature objects from infrared detection and ensuring operational stability.
- This approach provides a pathway for advanced thermal control in extreme temperature environments.
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