Accession Number:

ADA007261

Title:

Research on Helicopter Rotor Noise.

Descriptive Note:

Final rept. 2 Oct 73-31 Dec 74,

Corporate Author:

SIBLEY SCHOOL OF MECHANICAL AND AEROSPACE ENGINEERING ITHACA N Y

Personal Author(s):

Report Date:

1975-02-10

Pagination or Media Count:

17.0

Abstract:

During the period of this contract, research was carried out on three main aspects of helicopter rotor noise. These were the prediction of broadband noise due to random loadings, high speed blade noise, and noise due to the acceleration of solid bodies. The noise due to the acceleration of solid bodies was investigated experimentally and compared to calculations based on Farassats results. The final results show excellent agreement between theory and experiment and a paper has been submitted to the Journal of Sound and Vibration reporting this work.

Subject Categories:

  • Aerodynamics
  • Helicopters
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE