Jet Engine Class 'C' Test Cell Exhaust System Phase. Coanda/Refraction Noise Suppression Concept-Advanced Development.

Abstract

The successfully demonstrated Coanda/refraction air-cooled exhaust noise suppressor system is applied to the Navy requirement for an effective air-cooled retrofit configuration for the class 'C' test cells (concrete enclosure). The technical approach consists of analytically sizing retrofit components to meet both acoustic ad aerothermodynamic requirements and then testing at one-sixth scale using simulated afterburning engine exhaust to verify the design configuration. Model variations included exhaust stack height, exhaust stack inner flow passage configurations (straight walls and diffuser) and removal of a concrete internal partition wall. Extensive data were recorded and analyzed to identify the aerothermodynamic trends related to these configuration changes. Results present recommendations for an air-cooled Coanda exhaust noise suppression system for retrofit of Navy class 'C' test cells. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1979
Accession Number
ADA075277

Entities

People

  • D. L. Armstrong
  • R. E. Ballard

Organizations

  • Boeing

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Acquisition
  • Air Cooled
  • Air Entrainment
  • Air Intakes
  • Central Processing Units
  • Data Acquisition
  • Exhaust Gases
  • Exhaust Systems
  • Jet Engines
  • Mach Number
  • Measurement
  • Secondary Flow
  • Static Pressure
  • Surface Temperature
  • Test Equipment
  • Test Facilities

Readers

  • Acoustics.
  • Aerospace Engineering
  • Combustion and Flow Dynamics.