Abstract
The possibilities of the control of stability limit location were experimentally investigated in spherical Couette flow. The inner sphere rotational rate is periodically varied about non-zero average value, the outer sphere is fixed. Instability in the form of travelling azimuthal waves, the same as at stationary rotation, is caused by increasing of average rotational rate. Flow velocity measurements were carried out by laser Doppler anemometer. It was shown, that when modulation frequency become close to eigenfrequency of linear mode, both flow destabilization and stabilization were possible depending on modulation amplitude.
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