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| Titel |
Numerical simulation of 3-D flow around sounding rocket in the lower thermosphere |
| VerfasserIn |
J. Kurihara, K.-I. Oyama, N. Iwagami, T. Takahashi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 24, no. 1 ; Nr. 24, no. 1 (2006-03-07), S.89-95 |
| Datensatznummer |
250015460
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| Publikation (Nr.) |
 copernicus.org/angeo-24-89-2006.pdf |
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| Zusammenfassung |
| Numerical simulations using the Direct Simulation Monte Carlo (DSMC) method
are known to be useful for analyses of aerodynamic effects on in-situ rocket
measurements in the lower thermosphere, but the DSMC analysis of a spin
modulation caused by an asymmetric flow around the rocket spin axis has been
restricted to the two-dimensional and axially symmetric simulations in actual
sounding rocket experiments. This study provides a quantitative analysis of
the spin modulation using a three-dimensional (3-D) simulation of the asymmetric
flow with the DSMC method. Clear spin modulations in the lower thermospheric
N2 density measurement by a rocket-borne instrument are simulated
using the rocket attitude and velocity, the simplified payload structure, and
the approximated atmospheric conditions. Comparison between the observed and
simulated spin modulations show a very good agreement within 5% at around
100km. The results of the simulation are used to correct the spin
modulations and derive the absolute densities in the background atmosphere. |
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