RCAIDE.Library.Methods.Noise.Correlation_Buildup.Airframe.airframe_noise

airframe_noise

airframe_noise(microphone_locations, segment, config, settings)

This computes the noise from different sources of the airframe for a given vehicle for a constant altitude flight.

Assumptions:

Correlation based

Source:

Fink, Martin R. “Noise component method for airframe noise.” Journal of aircraft 16.10 (1979): 659-665.

Inputs:

vehicle - RCAIDE type vehicle

includes these fields:

S - Wing Area bw - Wing Span Sht - Horizontal tail area bht - Horizontal tail span Svt - Vertical tail area bvt - Vertical tail span deltaf - Flap deflection Sf - Flap area cf - Flap chord slots - Number of slots (Flap type) Dp - Main landing gear tyre diameter Hp - Main lading gear strut length Dn - Nose landing gear tyre diameter Hn - Nose landing gear strut length wheels - Number of wheels

noise segment - flight path data, containing:

distance_vector - distance from the source location to observer angle - polar angle from the source to the observer phi - azimuthal angle from the source to the observer

Outputs: One Third Octave Band SPL [dB]

SPL_wing - Sound Pressure Level of the clean wing SPLht - Sound Pressure Level of the horizontal tail SPLvt - Sound Pressure Level of the vertical tail SPL_flap - Sound Pressure Level of the flaps trailing edge SPL_slat - Sound Pressure Level of the slat leading edge SPL_main_landing_gear - Sound Pressure Level og the main landing gear SPL_nose_landing_gear - Sound Pressure Level of the nose landing gear

Properties Used:

N/A