feedtwin.engine.design.EngineDesign Class Reference

Public Member Functions
float	throat_diameter (self)
str	summary (self)
str	__repr__ (self)

Static Public Attributes
float	expansion_ratio = 0.0
float	chamber_volume = 0.0
float	design_chamber_pressure = 0.0
float	design_mixture_ratio = 0.0
float	design_thrust = 0.0
float	cstar = 0.0
float	nozzle_efficiency = 1.0
float	cstar_efficiency = 1.0
Mapping	fire_load = field(default_factory=dict)
Mapping	provenance = field(default_factory=dict)
tuple	warnings = ()

Detailed Description

A Layer-1 engine, reduced to its feed-system boundary.

Args:
    name: Where this came from -- a config path, usually.
    injector_type: ``impinging``, ``pintle`` or ``coaxial``.
    oxidiser: Ox side of the injector face.
    fuel: Fuel side.
    throat_area: ``A_t`` [m^2]. Converts total flow into chamber pressure.
    expansion_ratio: ``A_e / A_t``.
    chamber_volume: For the chamber's own filling dynamics [m^3].
    design_chamber_pressure: What Layer 1 sized it at [Pa].
    design_mixture_ratio: O/F by mass.
    design_thrust: [N].
    cstar: Characteristic velocity [m/s] at the design point. A single
        number is the honest default: the real ``c*`` moves with mixture
        ratio, and :class:`~feedtwin.engine.chamber.Chamber` takes a curve
        when one is available.
    provenance: Where each number came from, keyed by field. Import fills
        this so a run can say which numbers were read and which defaulted.

Definition at line 229 of file design.py.

Member Function Documentation

__repr__()

str feedtwin.engine.design.EngineDesign.__repr__

(

self

)

Definition at line 301 of file design.py.

summary()

str feedtwin.engine.design.EngineDesign.summary

(

self

)

Definition at line 289 of file design.py.

throat_diameter()

float feedtwin.engine.design.EngineDesign.throat_diameter

(

self

)

Definition at line 286 of file design.py.

References engine.layerx.card._ExpansionScaling.throat_area, feedtwin.engine.card.EngineCard.throat_area, feedtwin.engine.chamber.Chamber.throat_area, and payload.cold_gas_thruster.ColdGasThrusterResult.throat_area.

Member Data Documentation

chamber_volume

float feedtwin.engine.design.EngineDesign.chamber_volume = 0.0

static

Definition at line 257 of file design.py.

cstar

float feedtwin.engine.design.EngineDesign.cstar = 0.0

static

Definition at line 261 of file design.py.

Referenced by test_combustion_stability_audit.TestNyquistAllCrossings.case(), feedtwin.engine.chamber.ConstantCStar.combustion(), test_combustion_stability_audit.TestNyquistAllCrossings.L_indep(), engine.pipeline.combustion_physics.CstarWideTable.row(), engine.pipeline.stability.chug.ChugChamber.theta_c(), and feedtwin.engine.card.ChamberCard.to_dict().

cstar_efficiency

float feedtwin.engine.design.EngineDesign.cstar_efficiency = 1.0

static

Definition at line 268 of file design.py.

design_chamber_pressure

float feedtwin.engine.design.EngineDesign.design_chamber_pressure = 0.0

static

Definition at line 258 of file design.py.

design_mixture_ratio

float feedtwin.engine.design.EngineDesign.design_mixture_ratio = 0.0

static

Definition at line 259 of file design.py.

design_thrust

float feedtwin.engine.design.EngineDesign.design_thrust = 0.0

static

Definition at line 260 of file design.py.

expansion_ratio

float feedtwin.engine.design.EngineDesign.expansion_ratio = 0.0

static

Definition at line 256 of file design.py.

fire_load

Mapping feedtwin.engine.design.EngineDesign.fire_load = field(default_factory=dict)

static

Definition at line 273 of file design.py.

nozzle_efficiency

float feedtwin.engine.design.EngineDesign.nozzle_efficiency = 1.0

static

Definition at line 262 of file design.py.

provenance

Mapping feedtwin.engine.design.EngineDesign.provenance = field(default_factory=dict)

static

Definition at line 279 of file design.py.

warnings

tuple feedtwin.engine.design.EngineDesign.warnings = ()

static

Definition at line 280 of file design.py.

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The documentation for this class was generated from the following file:

• lib/feedtwin/feedtwin/engine/design.py