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

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 design/mechanical 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.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1975
Accession Number
ADB004728

Entities

People

  • C. D. Simcox
  • J. Atvars
  • R. S. Armstrong

Organizations

  • Boeing

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Boundary Layer
  • Commercial Aircraft
  • Exhaust Nozzles
  • Exhaust Systems
  • Fluid Mechanics
  • Jet Aircraft
  • Lapse Rate
  • Mixing
  • Pressure Distribution
  • Pressure Measurement
  • Static Pressure
  • Supersonic Aircraft
  • Supersonic Transport Aircraft
  • Turbojet Engines
  • Two Dimensional
  • Wind Tunnels

Readers

  • Acoustics.
  • Aerospace Engineering