Comparisons of computations with experiments for electron transpiration cooling at high enthalpies

Kyle M. Hanquist, Iain D. Boyd

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

A modeling approach for electron transpiration cooling of high enthalpy ight is compared to a set of experiments performed in a plasma arc tunnel for nitrogen and argon. The comparisons include nitrogen and argon ow at high enthalpies, 12,000 btu/lb and 5,000 btu/lb respectively, with a Mach number of 2.5 to 3. Converting the provided enthalpies and Mach numbers to freestream temperatures and velocities is discussed. The numerical approach is described including implementation of a thermionic emission boundary condition. Also described is the implementation of a finite-rate chemistry model for argon ionization. Different emissive materials are also investigated including graphite and tungsten. The comparisons include two different geometries with different leading edge radii. The numerical results produce a wide range of emitted current due to the uncertainties in freestream conditions and emissive material properties, but still agree well with the experiments. Future work recommendations are provided that may improve the physical accuracy of the modeling capabilities used in the comparisons.

Original languageEnglish (US)
Title of host publication45th AIAA Thermophysics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-13
Number of pages13
ISBN (Print)9781624103612
DOIs
StatePublished - 2015
Externally publishedYes
Event45th AIAA Thermophysics Conference, 2015 - Dallas, United States
Duration: Jun 22 2015Jun 26 2015

Publication series

Name45th AIAA Thermophysics Conference

Other

Other45th AIAA Thermophysics Conference, 2015
Country/TerritoryUnited States
CityDallas
Period6/22/156/26/15

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering

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