Prediction of ultraviolet emissions in rarefied hypersonic flow

Daniel P. Karipides, Iain D. Boyd, Deborah A. Levin

Research output: Contribution to conferencePaperpeer-review


Predictions of radiative emissions for a reentering satellite are made over the altitude range of 100 km to 160 km. The flow field is determined using the direct simulation Monte Carlo (DSMC) method. An overlay technique is used to simulate the interaction of trace species, necessitated by the extreme variance in species concentration at high altitudes. Ultraviolet radiative emissions of nitric oxide and atomic oxygen are calculated using a noneqnilibrium radiation code. Variation of input parameters include the use of different atmospheric models to determine the free stream conditions and different reaction rates in the relevant exchange reaction. Sensitivity to the input parameters is assessed. Uncertainty in the prediction of emissions is one order of magnitude at the lowest altitude. Effects of input parameters at higher altitudes are found to be reduced due to the extreme rarefied nature of the atmosphere in this region.

Original languageEnglish (US)
StatePublished - 1995
Externally publishedYes
Event30th Thermophysics Conference, 1995 - San Diego, United States
Duration: Jun 19 1995Jun 22 1995


Other30th Thermophysics Conference, 1995
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

  • General Engineering


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