RCAIDE.Library.Methods.Noise.Frequency_Domain_Buildup.Rotor.noise_directivities

noise_directivities

noise_directivities(Theta_er, Phi_er, cos_zeta_r, M_tot)

This computes the laminar boundary layer compoment of broadband noise using the method outlined by the Brooks, Pope and Marcolini (BPM) Model

Assumptions:

BPM models assumes a naca 0012 airfol

Source:

BPM Model: Brooks, Thomas F., D. Stuart Pope, and Michael A. Marcolini. Airfoil self-noise and prediction. No. L-16528. 1989.

Inputs:

Theta_e - Radiation angle with respect to free stream x (chordwise) [rad] Phi_e - Radiation angle with respect to free stream y (spanwise) [rad] M_c - Convection Mach number [-] M - Mach number [-]

Outputs

Dbar_h - high frequency directivity term [-] Dbar_l - low frequency directivity term [-]

Properties Used:

N/A