Displacements of the flow stability limit under rotational rate modulationстатья
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Дата последнего поиска статьи во внешних источниках: 12 августа 2020 г.
Аннотация:Possibilities of controlling the stability limit position in the spherical Couette flow are experimentally investigated. The rotational rate of the inner sphere periodically varies with respect to a nonzero average value, and the outer sphere remains motionless. The same as with steady-state rotation, the instability in the form of traveling azimuthal waves is caused by an increase in the average rotational rate. The flow velocity is measured by a laser Doppler anemometer. It is shown that the flow can be both destabilized and stabilized,depending on the modulation amplitude, when the modulation frequency approaches the eigenfrequency of linear mode.