Classes
class	Run

Functions
float	area (float d)
float	tube_id (float od_in, float wall_in=0.035)
None	main ()

Variables
float	IN = 0.0254
float	PSI = 6894.757
float	ROUGHNESS_M = 1.5e-6

Detailed Description

Compute EngineDesign's lumped feed ``K0`` from an actual component list.

EngineDesign's feed model is a single lumped coefficient per side:

    dp = K0 * 0.5 * rho * v^2,     v = mdot / (rho * A_hydraulic)

``docs/integration/line-loss-plan.md`` rates that "estimated K" -- rung 4 of 5, a
guess. Until the P&ID path lands, this script is rung 3: itemise the run, take each
K from a correlation rather than memory, and refer every one to a single reference
bore so the sum is a valid K0 for that A_hydraulic.

Reference-area conversion. dp is one number, so for two bores
    K_ref = K_local * (A_ref / A_local)^2
because v ~ 1/A. Losses at a WIDE section shrink when expressed against the high
velocity of a NARROW reference bore. Getting this backwards is the classic error.

Friction factors come from ``fluids`` (Colebrook); fitting K's are Crane TP-410 /
Idelchik forms, each labelled at its call site. Run:

    python3 scripts/feed_line_K.py

Function Documentation

◆ area()

float feed_line_K.area ( float d )

Definition at line 32 of file feed_line_K.py.

Referenced by feed_line_K.Run._refer(), and feed_line_K.Run.straight().

◆ main()

None feed_line_K.main ( )

Definition at line 97 of file feed_line_K.py.

References main(), and tube_id().

Referenced by main().

◆ tube_id()

float feed_line_K.tube_id	(	float	od_in,
		float	wall_in = 0.035 )

Definition at line 35 of file feed_line_K.py.

Referenced by main().

Variable Documentation

◆ IN

float feed_line_K.IN = 0.0254

Definition at line 28 of file feed_line_K.py.

◆ PSI

float feed_line_K.PSI = 6894.757

Definition at line 29 of file feed_line_K.py.

◆ ROUGHNESS_M

float feed_line_K.ROUGHNESS_M = 1.5e-6

Definition at line 30 of file feed_line_K.py.

Classes

Functions

Variables