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Título

Experimental and numerical investigation of an axisymmetric supersonic jet

AutorMaté, Belén ; Graur, Irina A.; Elizarova, Tatiana G.; Chirocov, I.; Tejeda, Guzmán ; Fernández Sánchez, José María ; Montero, Salvador
Fecha de publicación12-ene-2001
EditorCambridge University Press
CitaciónJournal of Fluid Mechanics 426 : 177-197 (2001)
ResumenA comprehensive study of a steady axisymmetric supersonic jet of CO2, including experiment, theory, and numerical calculation, is presented. The experimental part, based on high-sensitivity Raman spectroscopy mapping, provides absolute density and rotational temperature maps covering the significant regions of the jet: the zone of silence, barrel shock, Mach disk, and subsonic region beyond the Mach disk. The interpretation is based on the quasi-gasdynamic (QGD) system of equations, and its generalization (QGDR) considering the translational–rotational breakdown of thermal equilibrium. QGD and QGDR systems of equations are solved numerically in terms of a finite-difference algorithm with the steady state attained as the limit of a time-evolving process. Numerical results show a good global agreement with experiment, and provide information on those quantities not measured in the experiment, like velocity field, Mach numbers, and pressures. According to the calculation the subsonic part of the jet, downstream of the Mach disk, encloses a low-velocity recirculation vortex ring.
Descripción21 pages, 10 figures, 2 tables.
Versión del editorhttp://dx.doi.org/10.1017/S0022112000002329
URIhttp://hdl.handle.net/10261/24220
DOI10.1017/S0022112000002329
ISSN0022-1120
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