Abstract
Bursting occurs randomly in space and time, but has identifiable scales. In the light of this fact, an external acoustic perturbation, the time and length scales of which were the same as those of the bursting were applied to the Couette flow formed between concentric annuli. By LDV measurements, turbulence response to external perturbation has been investigated, and marked turbulence amplification has been observed at the frequencies proportional to the Reynolds numbers. The pertubation which caused such resonance behavior was termed specific external regulation.
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