Inheritance diagram for engine.pipeline.config_schemas.InjectorPlateConfig:

Collaboration diagram for engine.pipeline.config_schemas.InjectorPlateConfig:

Static Public Attributes
Literal	face
Optional	exit_land
Literal	groove_bottom
Literal	back
Optional	channel_width
Literal	channel_floor
Optional	channel_spot_length
int	channel_inlets
Literal	support
Optional	yield_strength
Optional	poisson_ratio
Optional	channel_flow_height_O
Optional	channel_flow_height_F
Literal	manifold_model
float	channel_entry_K
float	channel_pressure_regain
float	channel_roughness
List	back_grooves
Optional	rim_gland
Optional	port_thread
Optional	port_bore
Optional	port_radius_O
Optional	port_radius_F
Optional	port_clock_F_deg
Literal	profile_dxf_mode
Optional	profile_dxf

Detailed Description

The injector as a plug in the chamber sleeve: how its face and back are machined.
Geometry, plus a closed-form plate-bending estimate -- FEA, seals, the manifold cover and the
plug's retention are the designer's; engine/core/injectors/layout.py reports the lands they get. The holes' L/d is
discharge.<side>.orifice_l_over_d: one number sets both the Cd and, with channels, how deep
the channels sit.

Definition at line 163 of file config_schemas.py.

Member Data Documentation

◆ back

Literal engine.pipeline.config_schemas.InjectorPlateConfig.back

static

Initial value:

=  Field(default="channels",
        description="plenum: passages run through to a flat back face (a manifold volume behind "
                    "it). channels: the back face is flat with one annular channel per ring; each "
                    "passage runs from its exit to its channel floor and the channel is centred on "
                    "where the passage meets it.")

Definition at line 180 of file config_schemas.py.

◆ back_grooves

List engine.pipeline.config_schemas.InjectorPlateConfig.back_grooves

static

Initial value:

=  Field(default_factory=list,
        description="Grooves cut in the back face (face-seal glands), as drawn. The layout draws "
                    "them, keeps them in the plate section (bending) and flags one that runs into "
                    "a channel, the centre port or another groove.")

Definition at line 229 of file config_schemas.py.

◆ channel_entry_K

float engine.pipeline.config_schemas.InjectorPlateConfig.channel_entry_K

static

Initial value:

=  Field(default=0.5, ge=0.0,
        description="Loss from the feed port into each channel branch, on the branch velocity head "
                    "(sharp entrance, Idelchik diagram 3-1: 0.5). Assumed until flow-tested.")

Definition at line 220 of file config_schemas.py.

◆ channel_floor

Literal engine.pipeline.config_schemas.InjectorPlateConfig.channel_floor

static

Initial value:

=  Field(default="flat",
        description="Channels back: flat floor (holes break through off square; deburr and "
                    "flow-test), a floor turned as a cone normal to the passages (square "
                    "breakthrough), or spot: a flat floor channel_width wide beside a drill-spot "
                    "facet square to the passages, channel_spot_length across (square breakthrough; "
                    "the stand's plate).")

Definition at line 188 of file config_schemas.py.

◆ channel_flow_height_F

Optional engine.pipeline.config_schemas.InjectorPlateConfig.channel_flow_height_F

static

Initial value:

= Field(default=None, gt=0.0,

description="As channel_flow_height_O, for the fuel channel [m].")

Definition at line 213 of file config_schemas.py.

◆ channel_flow_height_O

Optional engine.pipeline.config_schemas.InjectorPlateConfig.channel_flow_height_O

static

Initial value:

=  Field(default=None, gt=0.0,
        description="Channels back: height [m] of the LOX manifold passage the flow sees (the "
                    "channel plus any groove in the cover). None => the channel depth the layout "
                    "draws. Flow area = channel_width x this.")

Definition at line 209 of file config_schemas.py.

◆ channel_inlets

int engine.pipeline.config_schemas.InjectorPlateConfig.channel_inlets

static

Initial value:

=  Field(default=1, ge=1,
        description="Channels back: feed ports into each channel. Each splits two ways around "
                    "the ring, so a branch carries mdot / (2 x inlets) at the port; the layout "
                    "checks that branch's velocity head against the injector drop.")

Definition at line 196 of file config_schemas.py.

◆ channel_pressure_regain

float engine.pipeline.config_schemas.InjectorPlateConfig.channel_pressure_regain

static

Initial value:

=  Field(default=1.0, ge=0.0, le=1.0,
        description="Static-pressure regain fraction as the branch slows past each hole (dividing-"
                    "flow manifold; 1 = ideal momentum recovery, Acrivos, Babcock & Pigford 1959; "
                    "measured 0.6-1). Assumed until flow-tested.")

Definition at line 223 of file config_schemas.py.

◆ channel_roughness

float engine.pipeline.config_schemas.InjectorPlateConfig.channel_roughness

static

Initial value:

= Field(default=3.2e-6, ge=0.0,

description="Channel wall roughness [m] for Churchill friction (machined, Ra ~0.8 um).")

Definition at line 227 of file config_schemas.py.

◆ channel_spot_length

Optional engine.pipeline.config_schemas.InjectorPlateConfig.channel_spot_length

static

Initial value:

= Field(default=None, gt=0.0,

description="Spot floor: the facet's length across the hole [m]. None => d + 2 x exit_land.")

Definition at line 194 of file config_schemas.py.

◆ channel_width

Optional engine.pipeline.config_schemas.InjectorPlateConfig.channel_width

static

Initial value:

=  Field(default=None, gt=0.0,
        description="Channels back: channel width [m]. None or narrower than the passage footprint "
                    "=> footprint + 2 x exit_land.")

Definition at line 185 of file config_schemas.py.

◆ exit_land

Optional engine.pipeline.config_schemas.InjectorPlateConfig.exit_land

static

Initial value:

=  Field(default=None, ge=0.0,
        description="Metal between a round exit and the edge of its flank, and between a passage "
                    "and its channel wall [m]. None => 0.5 mm (assumed).")

Definition at line 174 of file config_schemas.py.

◆ face

Literal engine.pipeline.config_schemas.InjectorPlateConfig.face

static

Initial value:

=  Field(default="contoured",
        description="flat: orifices leave an axis-normal face at the jet angle (elliptical exits, "
                    "the drill enters off square). contoured: the face is turned with an annular "
                    "groove whose flanks are normal to the jets, so each orifice leaves square and "
                    "round (SP-8089 p.43, 'local grooving ... to increase the effective angle').")

Definition at line 169 of file config_schemas.py.

◆ groove_bottom

Literal engine.pipeline.config_schemas.InjectorPlateConfig.groove_bottom

static

Initial value:

=  Field(default="flat",
        description="Contoured face: flat-bottomed groove just deep enough for each exit's land "
                    "(default), or the sharp V where the flanks meet.")

Definition at line 177 of file config_schemas.py.

◆ manifold_model

Literal engine.pipeline.config_schemas.InjectorPlateConfig.manifold_model

static

Initial value:

=  Field(default="ring_network",
        description="Channels back: 'ring_network' solves each channel as a dividing-flow ring "
                    "(each port splits two ways; holes fed by the local static pressure, NASA TN "
                    "D-5467; friction and momentum regain between holes, Acrivos/Bajura). 'plenum' "
                    "treats the manifold as still fluid at one pressure (the old model).")

Definition at line 215 of file config_schemas.py.

◆ poisson_ratio

Optional engine.pipeline.config_schemas.InjectorPlateConfig.poisson_ratio

static

Initial value:

= Field(default=None, gt=0.0, lt=0.5,

description="Plate material Poisson ratio for the plate-bending check. None => 0.3 (assumed).")

Definition at line 207 of file config_schemas.py.

◆ port_bore

Optional engine.pipeline.config_schemas.InjectorPlateConfig.port_bore

static

Initial value:

=  Field(default=None, gt=0.0,
        description="Diameter the port opens with onto the injector's back face [m]. None => the "
                    "thread's tap drill.")

Definition at line 240 of file config_schemas.py.

◆ port_clock_F_deg

Optional engine.pipeline.config_schemas.InjectorPlateConfig.port_clock_F_deg

static

Initial value:

=  Field(default=None,
        description="Angle from the first LOX port to the first fuel port [deg]. None => half the "
                    "port pitch.")

Definition at line 247 of file config_schemas.py.

◆ port_radius_F

Optional engine.pipeline.config_schemas.InjectorPlateConfig.port_radius_F

static

Initial value:

= Field(default=None, gt=0.0,

description="Radius of the fuel ports [m]. None => the middle of the fuel channel.")

Definition at line 245 of file config_schemas.py.

◆ port_radius_O

Optional engine.pipeline.config_schemas.InjectorPlateConfig.port_radius_O

static

Initial value:

= Field(default=None, gt=0.0,

description="Radius of the LOX ports [m]. None => the middle of the LOX channel.")

Definition at line 243 of file config_schemas.py.

◆ port_thread

Optional engine.pipeline.config_schemas.InjectorPlateConfig.port_thread

static

Initial value:

=  Field(
        default=None,
        description="Feed ports in the cover plate above the channels, channel_inlets per ring. "
                    "Drawn in the port-plate view; each port's bore is checked against the "
                    "back-face grooves it lands over.")

Definition at line 235 of file config_schemas.py.

◆ profile_dxf

Optional engine.pipeline.config_schemas.InjectorPlateConfig.profile_dxf

static

Initial value:

=  Field(default=None,
        description="The plate's revolved half-section as drawn (a DXF of the revolve sketch, "
                    "units set; path absolute or from EngineDesign/). When set it is the geometry: "
                    "plate thickness, face groove, the channels' sections (flow area, hydraulic "
                    "diameter, centroid radius) and each passage's exit, length and entry are read "
                    "from it (engine/core/injectors/plate_dxf.py), and where the config's rings, L/d "
                    "or igniter disagree with it the layout says so. channel_width and "
                    "channel_flow_height_* are then not used.")

Definition at line 254 of file config_schemas.py.

◆ profile_dxf_mode

Literal engine.pipeline.config_schemas.InjectorPlateConfig.profile_dxf_mode

static

Initial value:

=  Field(default="geometry",
        description="geometry: the drawing IS the plate (its section replaces the model's). check: "
                    "the plate is built from the fields above and compared with the drawing, line "
                    "by line; where they differ the layout says so.")

Definition at line 250 of file config_schemas.py.

◆ rim_gland

Optional engine.pipeline.config_schemas.InjectorPlateConfig.rim_gland

static

Initial value:

= Field(default=None,

description="Groove round the plug's rim (radial seal gland), as drawn.")

Definition at line 233 of file config_schemas.py.

◆ support

Literal engine.pipeline.config_schemas.InjectorPlateConfig.support

static

Initial value:

=  Field(default="simply_supported",
        description="How the plug's edge is held, for the layout's plate-bending check (circular "
                    "plate under Pc over the bore). simply_supported (conservative for a plug on a "
                    "shoulder or retaining ring) or clamped (edge cannot rotate).")

Definition at line 200 of file config_schemas.py.

◆ yield_strength

Optional engine.pipeline.config_schemas.InjectorPlateConfig.yield_strength

static

Initial value:

=  Field(default=None, gt=0.0,
        description="Plate material yield strength at temperature [Pa]. None => the plate-bending "
                    "check reports stress only; declared, stress above yield / 1.5 is flagged.")

Definition at line 204 of file config_schemas.py.

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

EngineDesign/engine/pipeline/config_schemas.py

Static Public Attributes

Detailed Description

Member Data Documentation

◆ back

◆ back_grooves

◆ channel_entry_K

◆ channel_floor

◆ channel_flow_height_F

◆ channel_flow_height_O

◆ channel_inlets

◆ channel_pressure_regain

◆ channel_roughness

◆ channel_spot_length

◆ channel_width

◆ exit_land

◆ face

◆ groove_bottom

◆ manifold_model

◆ poisson_ratio

◆ port_bore

◆ port_clock_F_deg

◆ port_radius_F

◆ port_radius_O

◆ port_thread

◆ profile_dxf

◆ profile_dxf_mode

◆ rim_gland

◆ support

◆ yield_strength