One-dimensional modeling methodology for shock tubes: Application to the EAST facility

Maitreyee P. Sharma, Alessandro Munafò, Marco Panesi, Aaron M. Brandis, Brett A. Cruden

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


In this work, a one-dimensional methodology for simulating shock tubes is developed. The model accounts for the viscous interactions of the shock with the shock tube wall by adding an area change source term in the 1-D conservation equations corresponding to the boundary layer growth. This source term corresponds to the mass and energy going into the boundary layer. The boundary layer growth is computed using a simple model with a scaling factor. This scale factor is used to tailor a solution to match the deceleration profile of a shock tube test. In doing so, not only will the source term take into account boundary layer losses, it will also cover any effect due to radiative cooling loses from the gas. For this study, the Electric Arc Shock Tube(EAST) facility at NASA Ames Research Center is modeled for Earth reentry conditions. The purpose of this paper is to investigate if anomalies identified for certain conditions in the EAST data are due to shock deceleration. These anomalies include measuring electron number density above equilibrium predictions and observing that radiance profiles can continually increase behind the shock, never reaching steady state, for certain shots (typically those less than 10 km/s). An eleven species air mixture is chosen to study the chemistry of the flow. Comparisons of the simulations to the experimental results are presented. Good agreement with the shock deceleration profiles was achieved by tuning in the boundary layer scale factor. The temperature as well as electron number density increases behind the shock, as has also been observed in the experiments. Finally, radiance comparisons between results from NEQAIR and experiments also show good agreement for some shots, but significant discrepancies are still observed for others.

Original languageEnglish (US)
Title of host publication2018 Joint Thermophysics and Heat Transfer Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105524
StatePublished - 2018
Event12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018 - [state] GA, United States
Duration: Jun 25 2018Jun 29 2018

Publication series

Name2018 Joint Thermophysics and Heat Transfer Conference


Other12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018
Country/TerritoryUnited States
City[state] GA

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics


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