To evaluate the effects of spallation on ablative material, it is necessary to evaluate the mass loss. To do so, a Lagrangian particle trajectory code is used to reconstruct trajectories that match the experimental data for all kinematic parameters. The results from spallation experiments conducted at the NASA HYMETS facility over a wedge sample were used. A data-driven adaptive methodology was used to adapts the ejection parameters until the numerical trajectory matches the experimental data. The preliminary reconstruction results show that the size of the particles seemed to be correlated with the location of the ejection event. The size of the particles ejected from the bottom edge of the wedge varies over three orders of magnitude, whereas the size of the ones ejected from the top (inclined) surface were more uniform (around 10 microns). On the bottom edge, the particles ejected near the leading edge were bulkier (10-1000 microns), where those that ejected further along, had a smaller size (0.1-1 microns).
|Number of pages||12|
|State||Published - Jan 11 2021|
|Event||AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online|
Duration: Jan 11 2021 → Jan 15 2021
|Conference||AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021|
|Period||1/11/21 → 1/15/21|
Bibliographical noteFunding Information:
Financial support for this work was provided by NASA Kentucky EPSCoR Award NNX10AV39A and NASA Award NNX13AN04A. The authors would like to thank J. B. Hoagg at the University of Kentucky for his assistance with the adaptation model. The authors would also like to thank F. Panerai (University of Illinois), S. Splinter, J.G. Gragg, and W. Geouge of HYMETS at NASA Langley Research Center, and K. Price at the University of Kentucky for their support with the experiments and data. The first author would also like to thank U. D?zel, R. Fu, and S. McDaniel at the University of Kentucky for their assistance.
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ASJC Scopus subject areas
- Aerospace Engineering