In aircraft design, heat transfer through radiation is also a significant consideration, especially for components exposed to high temperatures.
The formula for heat transfer rate through radiation is given by:
- Q is the heat transfer rate (in watts, W)
- ε is the emissivity of the material (a dimensionless value between 0 and 1, indicating the material’s ability to emit radiation)
- σ is the Stefan-Boltzmann constant (approximately 5.67 x 10^-8 W/m²·K⁴)
- A is the surface area emitting or receiving radiation (in square meters, m²)
- T₁ is the absolute temperature of the emitting surface (in kelvin, K)
- T₂ is the absolute temperature of the receiving surface (in kelvin, K)