| Abstract: | The characteristics of natural fluctuations of density in a laminar near wake behind a sharp cone in a hypersonic flow of
nitrogen at zero incidence are studied by the method of electronbeam fluorescence at Mach numberM=21 and unit Reynolds numberRe
1=6·105 m−1. The distributions of the mean density, integral fluctuations, and spectra of density fluctuations are obtained, the longitudinal
and azimuthal phase velocities of perturbations are determined, and the growth rates of perturbations in the wake are found.
The results are compared with the measurement data in the shock layer on a flat plate.
Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090. Translated
from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 41, No. 3, pp. 111–117, May–June, 2000 |
