Choked Fanno Flow

fullflow.ChokedFannoFlow

Choked Fanno flow model for ideal-gas duct flow.

ChokedFannoFlow computes the upstream state required for a constant-area adiabatic duct with friction to choke at the downstream end. The downstream state is treated as the Fanno star state.

Parameters

Name	Type	Description
name	str	Component name
network	Network	Network that owns this component
upstream_density	State	Upstream density
upstream_speed_of_sound	State	Upstream speed of sound
specific_heat_ratio	State	Specific heat ratio
friction_factor	State	Darcy friction factor
length	float	Tube length
inner_diameter	float	Tube inner diameter
upstream_static_enthalpy	State, optional	Upstream static enthalpy
regime	str, optional	Fanno branch to use
upstream_mach_number	State, optional	Upstream Mach number

Outputs

Name	Type	Description
mass_flux	State, optional	Computed mass flux
mass_flow	State, optional	Computed mass flow rate
total_enthalpy	State, optional	Upstream total enthalpy
downstream_mach_number	State or float, optional	Downstream Mach number
static_temperature_ratio	State, optional	Downstream-to-upstream static temperature ratio
static_pressure_ratio	State, optional	Downstream-to-upstream static pressure ratio
density_ratio	State, optional	Downstream-to-upstream density ratio
velocity_ratio	State, optional	Downstream-to-upstream velocity ratio
total_pressure_ratio	State, optional	Downstream-to-upstream total pressure ratio
total_temperature_ratio	State or float, optional	Downstream-to-upstream total temperature ratio
friction_factor_to_choke	State, optional	Friction factor required to choke for the current geometry
fL_over_D_to_choke	State, optional	Fanno friction length required to choke