Accession Number:

ADA229508

Title:

Twin Jets Screech Suppression Concepts Tested for 4.7% Axisymmetric and Two-Dimensional Nozzle Configurations

Descriptive Note:

Final rept. Jul 1987-Sep 1989,

Corporate Author:

WRIGHT RESEARCH AND DEVELOPMENT CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1990-09-29

Pagination or Media Count:

114.0

Abstract:

The sonic fatigue of nozzle flaps on F-15 and B-1 aircraft has demanded an increase in aeroacoustics research. A 4.7 scale, cold, static test was conducted at the Wright Research and Development Center WRDC to investigate noise suppression concepts on F-15 axisymmetric and two-dimensional nozzle configurations. These concepts included lateral spacing, secondary air jets, and tab suppression. Nozzle orientation parametrics included nozzle canting and pitch deflection. Design guideline charts are presented showing screech amplitude variation for each suppression and orientation concept. emk

Subject Categories:

  • Aircraft
  • Acoustics
  • Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE