Other
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.563..347h&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
An experimental study of interaction between transonic base flow and flow separation in over-expanded nozzle is described. Direct measurements of the side loads are performed by means of a specially designed strain-gage balance which measures the two components of the side force on the nozzle with external flow at Mach numbers between 0.5 and 0.82. The raw measurements are corrected for inertia effects thanks to informations provided by four accelerometers. Interaction between transonic buffeting and internal flow separation is studied by comparing the case of the base flow alone, the nozzle flow alone and finally the combination of both flows. A dual-bell nozzle is considered with two geometrical configurations characterized by different nozzle emergent length l D = 0.65 and l D = 0.53, where l is the nozzle's emergent length and D the base diameter. Influence of the nozzle pressure ratio, external Mach number and geometrical parameter l D are investigated. Key words: nozzle flow, side loads, flow separation, transonic buffeting, inertia effects.
Alziary de Roquefort T.
Girard Stéphane
Hieu Lê T. H.
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