Evaluation of Computational Modeling of Electron Transpiration Cooling at High Enthalpies. Hanquist, K. M., Alkandry, H., & Boyd, I. D. Journal of Thermophysics and Heat Transfer, 31(2):283–293, 2017. doi abstract bibtex 1 download Amodeling approach for electron transpiration cooling of high-enthalpy flight is evaluated through comparison to a set of experiments performed in a plasma arc tunnel for air and argon. The comparisons include air and argon flow at high enthalpies (27.9 and 11.6 MJ/kg, respectively), with a Mach number of 2.5 to 3. The conversion of the reported enthalpies and Mach numbers to freestream temperatures and velocities is discussed. The numerical approach is described, including implementation of a thermionic emission boundary condition and an electric field model. Also described is the implementation of a finite-rate chemistry model for argon ionization. Materials with different electron emission properties 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 they still agree well with the experimental measurements.
@article{hanquist2017c,
title = {Evaluation of {Computational} {Modeling} of {Electron} {Transpiration} {Cooling} at {High} {Enthalpies}},
volume = {31},
doi = {10.2514/1.T4932},
abstract = {Amodeling approach for electron transpiration cooling of high-enthalpy flight is evaluated through comparison to a set of experiments performed in a plasma arc tunnel for air and argon. The comparisons include air and argon flow at high enthalpies (27.9 and 11.6 MJ/kg, respectively), with a Mach number of 2.5 to 3. The conversion of the reported enthalpies and Mach numbers to freestream temperatures and velocities is discussed. The numerical approach is described, including implementation of a thermionic emission boundary condition and an electric field model. Also described is the implementation of a finite-rate chemistry model for argon ionization. Materials with different electron emission properties 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 they still agree well with the experimental measurements.},
number = {2},
journal = {Journal of Thermophysics and Heat Transfer},
author = {Hanquist, Kyle M. and Alkandry, Hicham and Boyd, Iain D.},
year = {2017},
keywords = {etc, own},
pages = {283--293},
}
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