Calculateur de Chauffage de Rentrée — Formule
## Stagnation-Point Reentry Heating
The heat flux at the stagnation point of a blunt body during reentry is governed by the Sutton-Graves correlation.
### Formula
**q = k * sqrt(rho / r_n) * v cubed**
where k = 1.83 x 10 to the -4 (for Earth atmosphere in SI units).
A larger nose radius spreads the heat over a wider area, reducing the peak flux. This is why reentry capsules are blunt.
The heat flux at the stagnation point of a blunt body during reentry is governed by the Sutton-Graves correlation.
### Formula
**q = k * sqrt(rho / r_n) * v cubed**
where k = 1.83 x 10 to the -4 (for Earth atmosphere in SI units).
A larger nose radius spreads the heat over a wider area, reducing the peak flux. This is why reentry capsules are blunt.
Exemple Résolu
LEO reentry at 7800 m/s, rho = 0.001 kg/m3, r_n = 1.0 m.
- q = 1.83e-4 * sqrt(0.001 / 1.0) * 7800^3
- sqrt(0.001) = 0.03162
- 7800^3 = 4.746e11
- q = 1.83e-4 * 0.03162 * 4.746e11
- q = 2 746 000 W/m2 = 2746 kW/m2