Accession Number:

ADB004728

Title:

SST Technology Follow-On Program - Phase 2. Noise Suppressor/Nozzle Development. Volume 1. Program summary

Descriptive Note:

Final rept. on Task III

Corporate Author:

BOEING COMMERCIAL AIRPLANE CO SEATTLE WA

Report Date:

1975-03-01

Pagination or Media Count:

68.0

Abstract:

An environmentally acceptable SST must have noise levels comparable to those of other large commercial transports operating in the same time period. A program has been conducted investigating a method of reducing high velocity jet noise associated with SST-type engines to levels below current regulations. The study investigated the following technology areas noise suppression, nozzle thrust performance, static to flight effects and designmechanical feasibility requirements. This technology base is believed applicable to any engine cycle having a high-velocity exhaust. The program concluded with static testing of an advanced suppressor nozzle system on a J-58 turbojet demonstrating a noise reduction in excess of 16 PNdB for 0.75 thrust penalty at static conditions. These results were then applied to the B2707-300 airplane to indicate the advance in technology achieved by the current program.

Subject Categories:

  • Transport Aircraft
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE