Other
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.563...37t&link_type=abstract
Proceedings of the Fifth European Symposium on Aerothermodynamics for Space Vehicles (ESA SP-563). 8-11 November 2004, Cologne,
Other
Scientific paper
/RESUME In the frame of German future space transportation technology and research program ASTRA a concept of a reusable winged liquid fly-back booster (LFBB) is under investigation. It has two booster stages attached to the expendable Ariane 5 core stage. During the first phase of the study several empirical and numerical analysis methods were used with respect to the configuration definition, which lead to the booster configuration LFBB Y7. The subsequent design loop required a more detailed investigation including wind tunnel measurements along the complete trajectory from separation at hypersonic speeds down to the subsonic fly-back cruise regime. Tests were performed not only creating a complete aerodynamic data set for trim and balance in longitudinal motion but also achieving a deeper understanding of the characteristics of the flow field of this vehicle including the influence between the canards and the wing. With the results of this test campaign and further calculations an improved aerodynamic design could be realised. The resulting configuration LFBB Y8 was tested again and compared to it's predecessor. Measurements were carried out in the DLR trisonic wind tunnel TMK (0.5 < Ma < 4) and the hypersonic wind tunnel H2K (Ma = 6.0 and Ma = 7.0). The angle of attack was varied from 2° to +8° and from 2° to +38° in TMK and H2K respectively. The angle of side slip was varied between -5° and 5°.
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