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  • 1
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    Thermal protection system ablation sensor (2011)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: An isotherm sensor tracks space vehicle temperatures by a thermal protection system (TPS) material during vehicle re-entry as a function of time, and surface recession through calibration, calculation, analysis and exposed surface modeling. Sensor design includes: two resistive conductors, wound around a tube, with a first end of each conductor connected to a constant current source, and second ends electrically insulated from each other by a selected material that becomes an electrically conductive char at higher temperatures to thereby complete an electrical circuit. The sensor conductors become shorter as ablation proceeds and reduced resistance in the completed electrical circuit (proportional to conductor length) is continually monitored, using measured end-to-end voltage change or current in the circuit. Thermocouple and/or piezoelectric measurements provide consistency checks on local temperatures.
    Keywords: Electronics and Electrical Engineering
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Development of a Sheathed Miniature Aerothermal Reentry Thermocouple for Thermal Protection System Materials (2011)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Sheathed Miniature Aerothermal Reentry Thermocouple is a micro-miniature thermocouple for high temperature measurement in extreme environments. It is available for use in Thermal Protection System materials for ground testing and flight. This paper discusses the heritage, and design of the instrument. Experimental and analytical methods used to verify its performance and limitations are described.
    Keywords: Fluid Mechanics and Thermodynamics; Spacecraft Design, Testing and Performance
    Type: ARC-E-DAA-TN3757 , AIAA Thermophysics Conference 2011; Jun 27, 2011 - Jun 30, 2011; Honolulu, HI; United States
    Format: application/pdf
    Location Call Number Expected Availability
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