DEVELOPMENT OF TEMPERATURE-SENSING ELEMENTS FOR JET ENGINES

Abstract

The thermoelectric characteristics were determined for the thermcouple MoSi2/Pt and ZrB2/Pt. Instability of emf output disqualifies these combinations from high temperature application in jet engine control. Chromel-alumel thermocouples were febricated with various shapes of the hot junction. The design was intended to achieve rapid heat transfer from the gas stream to the metal and adequate structural strength of the assembly. Characteristic response times were determined in a hot gas jet with a mass flow rate of 4 lb/sec/ft2. The recorded data represent the interaction of the time sweep on an oscillograph screen with the 63.2% mark of the thermal emf rise. The best response, namely O.75 second, was obtained from a thermocouple with a butt welded hot junction of thin-wall tubular elements (0.065" OD x 0.005" wall). Vibration test data for this construction were not available for inclusion in this report.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1952
Accession Number
AD0003562

Entities

People

  • Gary Steven
  • W. C. Troy

Organizations

  • IIT Research Institute

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Assembly
  • Chemical Reactions
  • Construction
  • Energy Transfer
  • Engines
  • Fabrication
  • Flow Rate
  • Heat Transfer
  • High Temperature
  • Jet Engines
  • Mass Flow
  • Materials
  • Measurement
  • Refractory Materials
  • Resistance
  • Thin Walls

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Metallurgy
  • Thermal Physics or Thermal Science.