The estimation of pressure on the surface of a flapping rigid plate by stereo PIV

Alexandre Suryadi, Shinnosuke Obi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The method to estimate the dynamic load of a flapping wing by the integration of pressure on the wing's surface is discussed. The flapping wing was modeled as a plate flapping sinusoidally in hovering condition. The flow around the flapping plate was measured using stereo PIV on multiple measurement planes along the out-of-plane direction. The phase-averaged velocity field of each measurement plane was calculated so that three-dimensional analyses could be applied. The phase-averaged pressure field was obtained from the integration of the three-dimensional Poisson equation for pressure using the available information acquired from stereo PIV measurements. The pressure field is visualized on the measurement planes. In this study, the estimated load was the torque of the axis of rotation. This torque was compared with the result from strain gauge measurements. The torque estimation, although only on a partial surface of the plate, is within reasonable agreement with the measured torque. The integration of the Poisson equation based on stereo PIV measurements and estimations of the torque shows that an increase in the torque at the start of a flapping stroke is caused by the stagnation on the surface of the plate from the flow that is induced by the leading-edge vortices.

Original languageEnglish
Pages (from-to)1403-1416
Number of pages14
JournalExperiments in Fluids
Volume51
Issue number5
DOIs
Publication statusPublished - 2011 Nov

Fingerprint

flapping
particle image velocimetry
torque
Torque
wings
Poisson equation
pressure distribution
hovering
dynamic loads
axes of rotation
Phase velocity
strain gages
leading edges
Dynamic loads
Strain gages
strokes
phase velocity
Loads (forces)
Vortex flow
velocity distribution

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes
  • Computational Mechanics
  • Mechanics of Materials

Cite this

The estimation of pressure on the surface of a flapping rigid plate by stereo PIV. / Suryadi, Alexandre; Obi, Shinnosuke.

In: Experiments in Fluids, Vol. 51, No. 5, 11.2011, p. 1403-1416.

Research output: Contribution to journalArticle

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