Observation of preferred instability modes in a mechanically excited thermal plume using Schlieren visualizations
Por:
Elicer-Cortés J.C., Ruz C., Hernández R.H., Pavageau M., Boyer D.
Publicada:
1 ene 2005
Resumen:
An experimental study of the instability modes of a laminar axisymmetric thermal plume under symmetrical controlled disturbances of varicose type was carried out. The Schlieren technique was used to investigate the considered flow. The range of excitation frequencies over which the studied plume became unstable was determined. The size of the corresponding induced large-scale structures was analyzed in function of the disturbance frequency. The results obtained throughout this work confirmed the ability of a plume to behave like a frequencies filter. © 2004 Elsevier Ltd. All rights reserved.
Filiaciones:
Elicer-Cortés J.C.:
Universidad de Chile, Departamento de Ingenieria Mecanica, Beauchef 850, Santiago, Chile
Ruz C.:
Universidad de Chile, Departamento de Ingenieria Mecanica, Beauchef 850, Santiago, Chile
Hernández R.H.:
Universidad de Chile, Departamento de Ingenieria Mecanica, Beauchef 850, Santiago, Chile
Pavageau M.:
Ecole des Mines de Nantes, GEPEA, CNRS 6144, 4 Rue Alfred Kastler, F-44307 Nantes Cedex 3, France
Boyer D.:
Univ. Nacional Autonoma de Mexico, Instituto de Física, Apartado Postal 20-364, 01000 México D.F., Mexico
|