|
| bool | enabled = Field(default=False, description="Enable ablative cooling model") |
| float | material_density = Field(default=1600.0, gt=0, description="Ablator (phenolic) density [kg/m³]") |
| float | heat_of_ablation = Field(default=2.5e6, gt=0, description="Heat of ablation [J/kg]: energy per kg consumed beyond the sensible heat from ambient_temperature to ablation_surface_temperature (quasi-steady Landau balance)") |
| float | thermal_conductivity = Field(default=0.35, gt=0, description="Ablator (phenolic) thermal conductivity [W/(m·K)]") |
| float | specific_heat = Field(default=1500.0, gt=0, description="Ablator (phenolic) specific heat [J/(kg·K)]") |
| float | initial_thickness = Field(default=0.01, gt=0, description="Initial ablative (phenolic) thickness [m]") |
| float | surface_temperature_limit = Field(default=1200.0, gt=0, description="Allowable surface temperature [K]. A check only; the thermal model runs at ablation_surface_temperature") |
| float | ablation_surface_temperature = Field(default=1986.0, gt=0, description="Char surface temperature while the liner ablates [K]. Default 1986 K is the SiO2 melting point (CRC Handbook), the bound on a silica-phenolic char surface; set it for the reinforcement actually used") |
| float | coverage_fraction = Field(default=1.0, gt=0, le=1.0, description="Fraction of chamber surface protected by ablative liner") |
| float | pyrolysis_temperature = Field(default=900.0, gt=0, description="Characteristic pyrolysis temperature of ablator [K]") |
| float | blowing_efficiency = Field(default=0.8, ge=0, le=1, description="Effectiveness of ablative gases in blocking convective heat flux (legacy constant factor, used if use_physics_based_blowing=False)") |
| bool | use_physics_based_blowing = Field(default=True, description="If True, use physics-based blowing parameter B = m_dot_pyrolysis/m_dot_external. If False, use constant blowing_efficiency factor.") |
| float | blowing_coefficient = Field(default=0.5, gt=0, description="Blowing coefficient c in empirical function f(B) = 1/(1 + c*B). Typical range: 0.3-0.8. Higher values = stronger blowing effect.") |
| float | blowing_min_reduction_factor = Field(default=0.1, ge=0, le=1, description="Minimum convective reduction factor (maximum blowing effectiveness). Prevents blowing from reducing convective heat transfer below this fraction. Default 0.1 means maximum 90% reduction. Lower values allow stronger blowing effect.") |
| float | turbulence_reference_intensity = Field(default=0.08, gt=0, description="Unused: Bartz already carries the chamber's turbulence (kept so old configs load)") |
| float | turbulence_sensitivity = Field(default=1.5, ge=0, description="Unused: Bartz already carries the chamber's turbulence (kept so old configs load)") |
| float | turbulence_exponent = Field(default=1.0, gt=0, description="Unused: Bartz already carries the chamber's turbulence (kept so old configs load)") |
| float | turbulence_max_multiplier = Field(default=3.0, gt=0, description="Unused: Bartz already carries the chamber's turbulence (kept so old configs load)") |
| Optional | throat_recession_multiplier = Field(default=None, gt=0, description="Throat recession multiplier vs chamber (if None, calculated from flow conditions). Typically 1.2-2.0") |
| float | char_layer_conductivity = Field(default=0.2, gt=0, description="Thermal conductivity of char layer [W/(m·K)]") |
| float | char_layer_thickness = Field(default=0.001, gt=0, description="Thickness of protective char layer [m]") |
| float | surface_emissivity = Field(default=0.85, ge=0, le=1, description="Surface emissivity for radiative heat transfer (0-1, typical 0.8-0.9 for charred ablators)") |
| float | ambient_temperature = Field(default=300.0, gt=0, description="Liner temperature at ignition [K] (the wall starts at ambient)") |
| float | radiative_sink_minimum_threshold = Field(default=400.0, gt=0, description="Unused: the hot face radiates only to the gas (kept so old configs load)") |
| float | radiative_sink_fallback_temperature = Field(default=600.0, gt=0, description="Unused: the hot face radiates only to the gas (kept so old configs load)") |
| bool | track_geometry_evolution = Field(default=True, description="Enable time-varying geometry tracking (L* evolution)") |
| bool | nozzle_ablative = Field(default=False, description="If True, nozzle exit also recedes (A_exit grows). If False, only throat recedes (expansion ratio decreases)") |
Ablative cooling configuration for chamber liner (phenolic)
Definition at line 663 of file config_schemas.py.
1.15.0