CaltechAUTHORS
  A Caltech Library Service

Carbon Dioxide Injection for Hypervelocity Boundary Layer Stability

Wagnild, Ross M. and Candler, Graham V. and Leyva, Ivett A. and Jewell, Joseph S. and Hornung, Hans G. (2010) Carbon Dioxide Injection for Hypervelocity Boundary Layer Stability. In: 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2010-1244. ISBN 978-1-60086-959-4. https://resolver.caltech.edu/CaltechAUTHORS:20191016-100220993

[img] PDF - Accepted Version
See Usage Policy.

1430Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20191016-100220993

Abstract

An approach for introducing carbon dioxide as a means or 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 e^N 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.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2010-1244DOIArticle
ORCID:
AuthorORCID
Jewell, Joseph S.0000-0002-4047-9998
Hornung, Hans G.0000-0002-4903-8419
Additional Information:© 2010 by Ross Wagnild. Published by the American Institute of Aeronautics and Astronautics, Inc. with permission.
Group:GALCIT
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2010-1244
Record Number:CaltechAUTHORS:20191016-100220993
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20191016-100220993
Official Citation:Carbon Dioxide Injection for Hypervelocity Boundary Layer Stability. Ross Wagnild, Graham Candler, Ivett Leyva, Joseph Jewell, and Hans Hornung. 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. January 2010. https://doi.org/10.2514/6.2010-1244
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99296
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Oct 2019 21:12
Last Modified:16 Oct 2019 21:12

Repository Staff Only: item control page