Prediction of flight measurements of high enthalpy nonequilibrium flow from a cubesat-class atmospheric probe
Morgan, Jonathan Deming
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https://hdl.handle.net/2142/101076
Description
Title
Prediction of flight measurements of high enthalpy nonequilibrium flow from a cubesat-class atmospheric probe
Author(s)
Morgan, Jonathan Deming
Issue Date
2018-04-25
Director of Research (if dissertation) or Advisor (if thesis)
Levin, Deborah A.
Department of Study
Aerospace Engineering
Discipline
Aerospace Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Date of Ingest
2018-09-04T20:31:58Z
Keyword(s)
hypersonic,nonequilibrium,cubesat,DSMC
Abstract
Spectral radiation is sensitive to many physical chemical aspects of high-enthalpy, non-equilibrium flows affect radiation and heat transfer estimates at low-earth altitudes, which is important as a flow diagnostic. For diatomic molecules, high energy collisions in the bow shock region result in ro-vibrionic transitions and release of photons in different wavelength bands. In this work, the Direct Simulations Monte Carlo (DSMC) method is used for the SASSI2 mission to determine the external flow field around a 3U CubeSat. The Nonequilibrium Radiative Transport and Spectra Program (NEQAIR) code is used to determine ultraviolet radiation from nitric oxide and the tangent slab approximation is used to estimate spacecraft visible glow radiance from nitrogen dioxide. Additional calculations are performed to provide a sensitivity analysis of radiance estimates based on the DSMC code utilized, chemical reaction rates, and CubeSat orientation.
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