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ISSN オンライン: 2642-0554

TURBULENCE CONTROL IN A PLANE JET USING A PIEZOELECTRIC EXCITATION DEVICE

R. Parker
Department of Mechanical Engineering, University of Newcastle. University Drive, Callaghan, NSW, 2308

S. Rajagopalan
Department of Mechanical Engineering, University of Newcastle. University Drive, Callaghan, NSW, 2308

Robert Anthony Antonia
Discipline of Mechanical Engineering, University of Newcastle, Newcastle, 2308, NSW, AUSTRALIA

要約

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.