Struct ReentryVehicle 

pub struct ReentryVehicle {
    pub nose_radius_m: f64,
    pub entry_velocity_m_s: f64,
    pub freestream_density_kg_m3: f64,
    pub tps_material: String,
    pub tps_thickness_mm: f64,
}

Aerodynamic heating model for a blunt-nosed reentry vehicle.

Uses the Fay–Riddell stagnation-point heat flux correlation and a one-dimensional heat conduction model for TPS sizing.

Fields

nose_radius_m: f64

Nose radius (m).

entry_velocity_m_s: f64

Entry velocity (m/s).

freestream_density_kg_m3: f64

Freestream density (kg/m³).

tps_material: String

TPS material type label (informational).

tps_thickness_mm: f64

TPS thickness (mm).

Implementations

impl ReentryVehicle

pub fn new( nose_radius_m: f64, entry_velocity_m_s: f64, freestream_density_kg_m3: f64, tps_material: &str, tps_thickness_mm: f64, ) -> Self

Construct a reentry vehicle TPS descriptor.

pub fn stagnation_heat_flux_w_m2(&self) -> f64

Stagnation-point cold-wall heat flux (W/m²) using the Sutton–Graves correlation:

q’’ = k_sg · √(ρ/R_N) · V³

where k_sg = 1.742×10⁻⁴ (SI units; ρ in kg/m³, R_N in m, V in m/s).

pub fn radiative_equilibrium_temperature_k(&self, emissivity: f64) -> f64

Peak surface temperature at the stagnation point (K) estimated from a radiation equilibrium condition:

q’’ = ε · σ · T⁴ → T = (q’’ / (ε·σ))^(1/4)

pub fn integrated_heat_load_mj_m2(&self, entry_duration_s: f64) -> f64

Integrated heat load (MJ/m²) for a given entry duration (s).

Uses the parabolic profile q(t) = q_peak · 4t(t_entry-t)/t_entry².

pub fn required_tps_thickness_mm( &self, tps_thermal_diffusivity_m2_s: f64, entry_duration_s: f64, ) -> f64

Required TPS thickness (mm) to limit bondline temperature below max_bondline_c (°C), using a 1-D semi-infinite slab approximation.

δ ≈ 2 · √(α · t_entry) · erfinv(1 − ΔT_allowed / ΔT_surface) (simplified as δ ≈ 1.5 · √(α · t_entry) for ΔT_allowed = 50 °C).

pub fn ballistic_coefficient_kg_m2(&self, mass_kg: f64, cd: f64) -> f64

Vehicle ballistic coefficient (kg/m²): β = m / (C_D · A_ref).

Higher β → deeper penetration before deceleration.

Trait Implementations

impl Clone for ReentryVehicle

fn clone(&self) -> ReentryVehicle

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ReentryVehicle

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.