Aeroacoustic codes for rotor harmonic and BVI noise - CAMRAD.Mod1/HIRES | Zendy

Thomas F. Brooks | Zendy; Casey L. Burley | Zendy; D. Douglas Boyd | Zendy; J. Jolly | Zendy

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Aeroacoustic codes for rotor harmonic and BVI noise - CAMRAD.Mod1/HIRES

Author(s) -

Thomas F. Brooks,

Casey L. Burley,

D. Douglas Boyd,

J. Jolly

Publication year - 1996

Publication title -

aeroacoustics conference

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.1996-1735

Subject(s) - rotor (electric) , acoustics , harmonic , noise (video) , harmonic analysis , physics , electrical engineering , engineering , computer science , electronic engineering , artificial intelligence , image (mathematics)

This document details the methodology and use of the CAMRAD.Mod1/HIRES codes, which were developed at NASA Langley Research Center for the prediction of helicopter harmonic and Blade-Vortex Interaction (BVI) noise. CAMRAD.Mod1 is a substantially modified version of the performance/trim/wake code CAMRAD. High resolution blade loading is determined in post-processing by HIRES and an associated indicial aerodynamics code. Extensive capabilities of importance to noise prediction accuracy are documented, including a new multi-core tip vortex roll-up wake model, higher harmonic and individual blade control, tunnel and fuselage correction input, diagnostic blade motion input, and interfaces for acoustic and CFD aerodynamics codes. Modifications and new code capabilities are documented with examples. A users'' job preparation guide and listings of variables and namelists are given.

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