Scaling laws for the performance of rigid propulsors intended for underwater locomotion

Daniel Floryan, Tyler Van Buren, Clarence W. Rowley, Alexander J. Smits

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

Abstract

Scaling laws are presented for the propulsive performance of rigid foils undergoing oscillatory motion in water. Water tunnel experiments on a nominally two-dimensional foil show that the scaling laws provide an excellent description of the data for thrust, power, and efficiency. The scaling laws are then extended to account for the effects of non-sinusoidal motions by using a parameter based on the maximum velocity of the trailing edge, which describes the experiments on non-sinusoidal gaits described by Jacobi elliptic functions reasonably well. Lastly, intermittent motions are considered. The thrust and power is shown to scale linearly with the duty cycle, and scaling laws for the energetics are presented. Intermittent motions are generally energetically advantageous over continuous motions, unless metabolic energy losses are sufficiently high.

Original languageEnglish (US)
Title of host publication10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
PublisherInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP10
ISBN (Electronic)9780000000002
StatePublished - Jan 1 2017
Event10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017 - Chicago, United States
Duration: Jul 6 2017Jul 9 2017

Publication series

Name10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
Volume1

Other

Other10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
CountryUnited States
CityChicago
Period7/6/177/9/17

All Science Journal Classification (ASJC) codes

  • Atmospheric Science
  • Aerospace Engineering

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  • Cite this

    Floryan, D., Van Buren, T., Rowley, C. W., & Smits, A. J. (2017). Scaling laws for the performance of rigid propulsors intended for underwater locomotion. In 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017 (10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017; Vol. 1). International Symposium on Turbulence and Shear Flow Phenomena, TSFP10.