This research advances a technique to simulate high
temperature/high speed effects in a high speed/low temperature
environment and to capture recession of the test article in
three-dimensions. A method of fabricating dry ice test articles was
developed, and the AFIT Mach 3 pressure-vacuum wind tunnel was used
in combination with the dry ice test articles to collect
three-dimensional ablation data for models of different shapes at
stagnation pressures ranging from approximately 0.4 atm to 3 atm
and stagnation temperatures equivalent to room temperature. High
speed Schlieren photography was used for visualization, and the
three dimensional shape change was quantified with sub-millimeter
accuracy using laser dot photogrammetry. Experimental results for
multiple shapes were compared to those computed using a
computational model called ACFD. The ACFD model employed a
finite-volume approach to solving the (3-D) Navier-Stokes equations
with the gas assumed to be at equilibrium while employing an
implicit solver accounting for the material response. By and large,
the computational approach was validated for the conditions tested
herein. Measurement of ablation rates at the stagnation point
yielded approximate values of convective heat transfer rate when
conduction through the solid is assumed negligible. The results of
this analysis compared favorably to a variety of extensions of the
Fay-Riddell correlation given in the literature. Paths for further
research were selected and discussed.
General
| Imprint: |
Biblioscholar
|
| Country of origin: |
United States |
| Release date: |
November 2012 |
| First published: |
November 2012 |
| Authors: |
David W. Callaway
|
| Dimensions: |
246 x 189 x 16mm (L x W x T) |
| Format: |
Paperback - Trade
|
| Pages: |
294 |
| ISBN-13: |
978-1-288-33251-9 |
| Categories: |
Books >
Social sciences >
Education >
General
Promotions
|
| LSN: |
1-288-33251-3 |
| Barcode: |
9781288332519 |
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