Forced Response Testing of an Axi-Centrifugal Turboshaft Engine.

Abstract

Dynamic data from tests of a T55-L-712 engine are presented. Engine stall/surge data were analyzed using digital signal processing techniques. In addition, forced response testing (system identification studies) was done at various engine speeds. Forced response testing was done using eight jet ejectors approximately equally circumferentially spaced about the compressor front face. This paper presents some preliminary results for the ground idle (approximately 60% of design speed) point. Brief descriptions of the jet injection system, the test matrix, and analysis techniques used are presented. Results of these analyses indicate a substantial transfer of energy across the compressor first stage at some frequencies and that the ejectors are effective in modifying the local flow conditions in front of the first compressor stage.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1996
Accession Number
ADA326158

Entities

People

  • A. K. Owen
  • Donald C. Braun
  • Duane L. Mattern
  • Dzu K. Le

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Acquisition
  • Compressors
  • Data Acquisition
  • Data Analysis
  • Digital Signal Processing
  • Energy Transfer
  • Fourier Analysis
  • Frequency
  • Gas Turbines
  • Military Research
  • Pressure Transducers
  • Signal Processing
  • Sine Waves
  • Standing Waves
  • Turbines
  • Turboshaft Engines
  • Vehicles

Fields of Study

  • Engineering

Readers

  • Aerodynamics.
  • Combustion and Flow Dynamics.
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster