Accession Number:

AD0648022

Title:

AERODYNAMIC NOISE SIMULATION IN SONIC FATIGUE FACILITY.

Descriptive Note:

Final rept., 15 Jan 64-31 Mar 65,

Corporate Author:

BOLT BERANEK AND NEWMAN INC CAMBRIDGE MASS

Report Date:

1966-11-01

Pagination or Media Count:

73.0

Abstract:

The possibility of simulating a turbulent boundary-layer noise environment using the air-flow capability of the RTD Sonic Fatigue Facility is investigated. The philosophy is adopted that it is the mechanical power absorbed by the structure from the environment that is to be duplicated. Calculations are developed that allow the prediction of the mechanical power injected into a structure by a turbulent boundary layer TBL, and by a turbulent wall-jet. The possibility of replacing the power injected by the TBL by using turbulent wall-jets impinging on a structural model of a section of a supersonic transport is studied. Results indicate that high-frequency excitation above 1kHz can be adequately simulated, but that the air-flow capabilities of the facility would be exceeded by an attempt to excite a structure as large as the one chosen by a set of wall-jets at lower frequencies. Author

Subject Categories:

  • Transport Aircraft
  • Acoustics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE