Helmholtz piezo-electric power generation

Matthew Olson, Zachary Schaffer, Rhett William Jefferies

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

Abstract

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

Other

Other41st Aerospace Sciences Meeting and Exhibit 2003
CountryUnited States
CityReno, NV
Period1/6/031/9/03

Fingerprint

Helmholtz resonators
Electric power generation
orifices
electric power
wind tunnel
power generation
Resonators
Orifices
wind tunnels
Wind tunnels
low speed wind tunnels
turbulent boundary layer
flow visualization
energy sources
Piezoelectric devices
upstream
visualization
cavity
Flow visualization
resonators

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Olson, M., Schaffer, Z., & Jefferies, R. W. (2003). Helmholtz piezo-electric power generation. In 41st Aerospace Sciences Meeting and Exhibit
Olson, Matthew ; Schaffer, Zachary ; Jefferies, Rhett William. / Helmholtz piezo-electric power generation. 41st Aerospace Sciences Meeting and Exhibit. 2003.
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Olson, M, Schaffer, Z & Jefferies, RW 2003, Helmholtz piezo-electric power generation. in 41st Aerospace Sciences Meeting and Exhibit. 41st Aerospace Sciences Meeting and Exhibit 2003, Reno, NV, United States, 1/6/03.

Helmholtz piezo-electric power generation. / Olson, Matthew; Schaffer, Zachary; Jefferies, Rhett William.

41st Aerospace Sciences Meeting and Exhibit. 2003.

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

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AB - 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.

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Olson M, Schaffer Z, Jefferies RW. Helmholtz piezo-electric power generation. In 41st Aerospace Sciences Meeting and Exhibit. 2003