Artículo de revista
Observation of preferred instability modes in a mechanically excited thermal plume using Schlieren visualizations
Fecha
2005-02Registro en:
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 32 (3-4): 360-370 FEB 2005
0735-1933
Autor
Elicer Cortés, Juan
Ruz, C.
Hernández, R. H.
Pavageau, Michel
Boyer, Denis
Institución
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.