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Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

TURBULENCE CONTROL IN A PLANE JET USING A PIEZOELECTRIC EXCITATION DEVICE

pages 259-264
DOI: 10.1615/TSFP2.1170
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摘要

This study is concerned with the development and evaluation of a localised method of shear flow excitation in a plane jet using piezoelectric actuators. Piezo excitation results in an increase in u' and v' and promotes the formation of vortices in the initial region of the jet. When compared with global excitation of the flow, for example via acoustic excitation, piezoelectric actuation is able to provide a comparable level of flow modification but with a significantly lower power input. The effect of excitation on the distribution of U, u' and v' as well as mixing layer spectra is examined using hotwire anemometry and flow visualization. These results are compared with those observed when applying acoustic excitation in the same test facility.

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