@inproceedings{5672482096a8401a882c8547739ed534,
title = "Carbon dioxide injection for hypervelocity boundary layer stability",
abstract = "An approach for introducing carbon dioxide as a means of stabilizing a hypervelocity boundary layer over a slender bodied vehicle is investigated through the use of numerical simulations. In the current study, two different test bodies are examined. The first is a five-degree- half-angle cone currently under research at the GALCIT T5 Shock Tunnel with a 4 cm porous wall insert used to transpire gas into the boundary layer. The second test body is a similar cone with a porous wall over a majority of cone surface. Computationally, the transpiration is performed using an axi-symmetric flow simulation with wall-normal blowing. The effect of the injection and the transition location are gauged by solving the parabolized stability equations and using the semi-empirical eN method. The results show transition due to the injection for the first test body and a delay in the transition location for the second test body as compared to a cone without injection under the same flight conditions. The mechanism for the stabilizing effect of carbon dioxide is also explored through selectively applying non-equilibrium processes to the stability analysis. The results show that vibrational non-equilibrium plays a role in reducing disturbance amplification; however, other factors also contribute.",
author = "Wagnild, {Ross M.} and Candler, {Graham V.} and Leyva, {Ivett A.} and Jewell, {Joseph S.} and Hornung, {Hans G.}",
year = "2010",
language = "English (US)",
isbn = "9781600867392",
series = "48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition",
booktitle = "48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition",
note = "48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition ; Conference date: 04-01-2010 Through 07-01-2010",
}