RCAIDE.Library.Components.Powertrain.Converters.Fan

Fan#

class Fan(*args, **kwarg)[source]#

Bases: Converter

A fan component model for turbofan and ducted fan propulsion systems.

tag#

Identifier for the fan component. Default is ‘Fan’.

Type:

str

polytropic_efficiency#

Efficiency of the compression process accounting for losses. Default is 1.0.

Type:

float

pressure_ratio#

Ratio of outlet to inlet total pressure. Default is 1.0.

Type:

float

angular_velocity#

Rotational speed of the fan [rad/s]. Default is 0.0.

Type:

float

Notes

The Fan class models the compression and energy addition process in a fan stage. The model:

  • Calculates work input required for given pressure ratio

  • Accounts for losses through polytropic efficiency

  • Handles variable speed operation

  • Assumes axial flow conditions

  • Models both subsonic and transonic fan operation

Major Assumptions

  • Pressure ratio and efficiency do not change with varying conditions

  • Uniform flow at inlet and exit

  • No radial variations in flow properties

  • Adiabatic process (no heat transfer with surroundings)

  • Steady flow conditions

Definitions

‘Polytropic Efficiency’

Measure of compression efficiency accounting for real gas effects

‘Pressure Ratio’

Ratio of exit to inlet total pressure

‘Angular Velocity’

Rotational speed of the fan rotor

References

[1] Mattingly, J. D., & Boyer, K. M. (2016). Elements of propulsion: Gas

turbines and rockets, second edition Jack D. Mattingly, Keith M. Boyer. American Institute of Aeronautics and Astronautics.

See also

RCAIDE.Library.Components.Component, RCAIDE.Library.Methods.Powertrain.Converters.Fan.append_fan_conditions

append_operating_conditions(segment, energy_conditions, noise_conditions=None)[source]#