Accession Number:

AD0723339

Title:

Sonic Boom Modeling Investigation of Topographic and Atmospheric Effects.

Descriptive Note:

Final rept. Apr 69-Apr 70,

Corporate Author:

GENERAL APPLIED SCIENCE LABS INC WESTBURY N Y

Report Date:

1970-04-01

Pagination or Media Count:

157.0

Abstract:

The effects of sonic boom interaction with several topographic configurations and with inertial and thermal turbulence have been investigated in reduced scale utilizing an acoustic horn type test facility. Operations of the facility and the specific modifications required to generate the inertial and thermal turbulence are desired. Eight topographic model configurations were tested over a range of model orientations and wave incidence angles corresponding to Mach numbers ranging between 1.0 and 1.4. Regions of significant over-pressure on the model surface, arising as a consequence of wave reflection phenomena were studied in particular. Good agreement, both as to the magnitude of the over-pressure and the time of occurrence of the pressure peaks, was obtained with the predictions of linear acoustic theory. Author

Subject Categories:

  • Aircraft
  • Test Facilities, Equipment and Methods
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE