Theoretical and experimental studies on axisymmetric nozzles have shown that two dimensional flow effects have an important role on the nozzle performances. These effects are enhanced when nozzles operate in the typical conditions of aerospace applications, since chemical reactions of dissociation and atomic recombination occur, which may be significantly influenced by the radial gasdynamic phenomena. In this paper the influence of the flowfield behaviour on the finite rate chemical kinetics is analyzed for Single Expansion Ramp Nozzles (SERN), which display strong unsymmetric flowfields. The analysis is focused on the throat region, where these effects are stronger, in order to indicate the causes of the flow behaviour and provide qualitative evaluations of its interaction with chemical kinetics, and consequently of their influence on the nozzle performances.
Influence of Chemical Kinetics Effects in Nozzles Shape design / Onofri, M.; Favini, Bernardo; Paciorri, Renato. - In: AIAA PAPER. - ISSN 0146-3705. - (1993). (Intervento presentato al convegno 11th International Symposium on Air Breathing Engines tenutosi a Tokyo (Japan) nel September 20-24 1993).
Influence of Chemical Kinetics Effects in Nozzles Shape design
FAVINI, Bernardo;PACIORRI, Renato
1993
Abstract
Theoretical and experimental studies on axisymmetric nozzles have shown that two dimensional flow effects have an important role on the nozzle performances. These effects are enhanced when nozzles operate in the typical conditions of aerospace applications, since chemical reactions of dissociation and atomic recombination occur, which may be significantly influenced by the radial gasdynamic phenomena. In this paper the influence of the flowfield behaviour on the finite rate chemical kinetics is analyzed for Single Expansion Ramp Nozzles (SERN), which display strong unsymmetric flowfields. The analysis is focused on the throat region, where these effects are stronger, in order to indicate the causes of the flow behaviour and provide qualitative evaluations of its interaction with chemical kinetics, and consequently of their influence on the nozzle performances.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
