Other
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.563..579e&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
In summer 2003 the Hypersonic Ludwieg Tube Braunschweig (HLB) has been commissioned. It has been designed for Machnumber M = 6. The operative range of the unit Reynoldsnumber is between 3 · 106 1/m and 20 · 106 1/m. The test section has 500 mm diameter and the run time with near steady flow conditions is 80 ms. First measurements of the pitot pressure within the test-section have shown good transverse uniformity, but measurements of the total temperature within the storage tube revealed a strong stratification accompanied by convective flow within the heated section of the tube. In this paper we present recent measures to attenuate the stratification. Measurements of the temperature distribution within the testsection have been performed. Further we compare first results of invisvid numerical simulations of the unsteady onset of flow in the HLB to measured data. Key words: hypersonic flow, Ludwieg tube, flow measurement techniques, numerical flow simulation.
Estorf M.
Radespiel R.
Wolf Thomas
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