Synthetic jets with piezoelectric diaphragms [5761-32]
نویسندگان
چکیده
Piezoelectric diaphragms are used as synthetic jets because of their size, rapid time response, and relatively low power consumption. Among the piezoelectric diaphragms used are unimorphs and Bimorphs. In this study, a bimorph diaphragm, a thin Unimorph pre-stressed device and a Radial Field Diaphragm (RFD) are compared. A bimorph consists of two bonded PZT discs, a thin Unimorph pre-stressed device consists of copper, PZT, and stainless steel and a Radial Field Diaphragm consist of a layer of PZT with inter-digitized electrodes encapsulated in Kapton film. The effects of driving waveform on jet velocity are studied for each of these actuators. The actuators are driven at varying frequencies and the differential pressure in the cavity is monitored.
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