engine.optimizer.utils Namespace Reference

Functions
float	total_wall_thickness_m (Any config)
Dict[str, Any]	extract_all_parameters (PintleEngineConfig config)
float	impinging_chamber_inner_diameter_for_bounds (PintleEngineConfig config, *, float max_chamber_outer_diameter_m, float wall_thickness_m=DEFAULT_IMPINGING_WALL_THICKNESS_M)
int	impinging_n_elements_hi_int (float chamber_inner_diameter_m, *, float pitch_est_m=IMPINGING_JET_PITCH_ESTIMATE_M, int absolute_cap=IMPINGING_N_ELEMENTS_ABSOLUTE_CAP)
float	impinging_d_jet_upper_bound_m (float chamber_inner_diameter_m)
float	impinging_spacing_upper_bound_m (float chamber_inner_diameter_m)

Variables
float	DEFAULT_IMPINGING_WALL_THICKNESS_M = 0.0254
float	IMPINGING_JET_PITCH_ESTIMATE_M = 0.004
int	IMPINGING_N_ELEMENTS_ABSOLUTE_CAP = 200

Detailed Description

Utility functions for optimization layers.

Contains parameter extraction and other helper utilities.

Function Documentation

extract_all_parameters()

Dict[str, Any] engine.optimizer.utils.extract_all_parameters

(

PintleEngineConfig

config

)

Extract all optimized parameters from config.

Definition at line 57 of file utils.py.

References min.

impinging_chamber_inner_diameter_for_bounds()

float engine.optimizer.utils.impinging_chamber_inner_diameter_for_bounds	(	PintleEngineConfig	config,
		*	,
		float	max_chamber_outer_diameter_m,
		float	wall_thickness_m = DEFAULT_IMPINGING_WALL_THICKNESS_M )

Bore used for impinging packing / n_elements limits.

Prefer ``chamber_geometry.chamber_diameter``; else frozen outer diameter minus wall;
else legacy heuristic ``0.5 * max_od - wall`` (underestimates full-OD designs).

Definition at line 149 of file utils.py.

References max.

impinging_d_jet_upper_bound_m()

float engine.optimizer.utils.impinging_d_jet_upper_bound_m

(

float

chamber_inner_diameter_m

)

Allow larger jets on larger bores; keep 4 mm floor for small chambers.

Definition at line 189 of file utils.py.

References max, and min.

impinging_n_elements_hi_int()

int engine.optimizer.utils.impinging_n_elements_hi_int	(	float	chamber_inner_diameter_m,
		*	,
		float	pitch_est_m = IMPINGING_JET_PITCH_ESTIMATE_M,
		int	absolute_cap = IMPINGING_N_ELEMENTS_ABSOLUTE_CAP )

Upper integer count ~ circumference / pitch, capped for optimizer stability.

Definition at line 176 of file utils.py.

References max, and min.

impinging_spacing_upper_bound_m()

float engine.optimizer.utils.impinging_spacing_upper_bound_m

(

float

chamber_inner_diameter_m

)

Wider spacing cap for large injector faces (packing uses π D²/4).

Definition at line 195 of file utils.py.

References max, and min.

total_wall_thickness_m()

float engine.optimizer.utils.total_wall_thickness_m

(

Any

config

)

Total chamber-wall thickness (both sides) subtracted from the max OD to get
the gas-side inner diameter: ``2 x (metal case + ablative liner)``.

Derived from its physical parts instead of stored as a separate lump field:
  * metal — ``design_requirements.metal_wall_thickness_per_side_m`` (geometry
    envelope for the structural case; default 0.25 in/side), and
  * liner — ``ablative_cooling.initial_thickness`` when ablative cooling is
    enabled (the same field Layer 3 sizes, so the wall tracks the sized liner
    on reruns automatically — no write-back step to lose the metal term).

The graphite insert is a THROAT insert (axial), not part of the chamber-barrel
radial stack, so it does not contribute. Film/regen cooling contribute no liner
thickness here (channel geometry is not modeled as barrel thickness).

Falls back to the legacy 1-inch total (``DEFAULT_IMPINGING_WALL_THICKNESS_M``)
only when the config lacks the fields (mocks / legacy config objects).

Definition at line 19 of file utils.py.

Variable Documentation

DEFAULT_IMPINGING_WALL_THICKNESS_M

float engine.optimizer.utils.DEFAULT_IMPINGING_WALL_THICKNESS_M = 0.0254

Definition at line 14 of file utils.py.

IMPINGING_JET_PITCH_ESTIMATE_M

float engine.optimizer.utils.IMPINGING_JET_PITCH_ESTIMATE_M = 0.004

Definition at line 15 of file utils.py.

IMPINGING_N_ELEMENTS_ABSOLUTE_CAP

int engine.optimizer.utils.IMPINGING_N_ELEMENTS_ABSOLUTE_CAP = 200

Definition at line 16 of file utils.py.