Helmholtz piezo-electric power generation

Matthew Olson, Zachary Schaffer, Rhett Jefferies

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Experimental research of power generation using a piezoelectric device, in conjunction with a Helmholtz resonator, was conducted in a low-speed wind tunnel. RMS power levels on the order of 40 milliWatts were recorded for a single piezoelectric tab placed in the rectangular inlet of a Helmholtz resonator. For a freestream velocity of 5-90 ft/s, piezoelectric power production was maximized when the piezoelectric tab was placed at the bottom of the Helmholtz orifice, flush with the top surface of the wind tunnel and within a turbulent boundary layer. When the piezoelectric tab was attached on the cavity side of the orifice opening (i.e. not flush with the top surface of the wind tunnel), the piezo produced the second-highest RMS power. The production of power using this method shows the feasibility of someday using this as a clean, renewable, passive energy source. Flow visualization showed that the flow entered the sealed Helmholtz resonator near the downstream end of the orifice and exited at the upstream end, regardless of piezo orientation. The flow also oscillated upon entering the resonator, and the magnitude of the circulatory air increased with increasing velocity.

Original languageEnglish (US)
Title of host publication41st Aerospace Sciences Meeting and Exhibit
StatePublished - 2003
Event41st Aerospace Sciences Meeting and Exhibit 2003 - Reno, NV, United States
Duration: Jan 6 2003Jan 9 2003

Publication series

Name41st Aerospace Sciences Meeting and Exhibit


Other41st Aerospace Sciences Meeting and Exhibit 2003
Country/TerritoryUnited States
CityReno, NV

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering


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