By William L. Sellers III, Douglas L. Dwoyer (auth.), A. Boutier (eds.)
Because of the growing to be curiosity in hypersonic flows, the AGARD Fluid Dynamics Panel initiated a sub-working workforce on instrumentation for hypersonics in 1989. This sub-group, chaired through J. WENDT (VKI -Belgium), used to be composed of: A. BOUTIER (ONERA -France), okay. BUTEFISCH (DLR -Germany), R. CATTOLICA (SANDIA Lab. -USA), V. CLINE (AEDC -USA), A. GIRARD (ONERA -France), R. McKENZIE (NASA Ames -USA), S. OCHELTREE (NASA Langley -USA) and G. SMEETS (ISL -Franco-German Inst.). due to numerous conferences, the assumption got here to prepare this workshop, twenty seventh April - 1st may perhaps 1992, on "New developments in Instrumentation for Hypersonic Research", at Le Fauga-Mauzac ONERA heart, in France, the place the recent hot-shot arc-heated facility F4, in addition to a brand new convention development, have been lately accomplished. This workshop has been prepared in shut reference to the AGARD FDP Symposium to be held in Torino four - eight may perhaps 1992 on "Theoretical and Experimental equipment in Hypersonic Flows": the most conclusions and ideas expressed by means of the papers and through the discussions of this workshop are said in consultation 7 and feature been awarded in Torino in a distinct Instrumentation consultation. As chairman of this workshop, I convey many because of the Organizing Committee composed of Karl BUTEFISCH, Andre GIRARD, Stewart OCHELTREE and John WENDT for his or her very confident support, resulting in a gathering that was once well-known to be very fruitful for all of the participants.
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COMPUTATION AND EXPERIMENTATION OF FREE PISTON SHOCK TUNNELS· EXAMPLE OF THE MARSEILLE FACILITY R. Brun, Y. Burtschell, L. Dumitrescu, M. Dumitrescu, L. Houas, L. Labracherie and D. Zeitoun Universite de Provence Centre de Saint -Jerome, Lab. SEIT, Dept MHEQ, Case 321 13397 Marseille, France ABSTRACT. A numerical analysis of the hypersonic free piston shock tunnel in construction in Marseille is presented. Since the few wind tunnels of this type actually operational (Austtalia) suffer of performance losses when compared to expected data given by the analytical theory (Stalker.
Dumitrescu, M. Dumitrescu, L. Houas, L. Labracherie and D. Zeitoun Universite de Provence Centre de Saint -Jerome, Lab. SEIT, Dept MHEQ, Case 321 13397 Marseille, France ABSTRACT. A numerical analysis of the hypersonic free piston shock tunnel in construction in Marseille is presented. Since the few wind tunnels of this type actually operational (Austtalia) suffer of performance losses when compared to expected data given by the analytical theory (Stalker. 1967). an axisymmettic numerical simulation is performed by a finite volume method which allows to emphasize the unsteady phenomena which resttict the expected performances.
They can presently yield some guidelines for the modelling effort but not supply wind-tunnel data which are still the only way to investigate more complex flows and/or higher Reynolds numbers. However, it must be pointed out that these numerical simulations give access to quantities that play an important role in turbulence modelling such as pressure/velocity correlations which are very difficult to measure. Moreover, they are presently the only way to have 49 accurate turbulence data very close to the wall.