Propulsion mechanism employing flapping foils

Details Propulsion mechanism employing flapping foils Propulsion mechanism employing flapping foils

1993-11-18

1995-03-28

Basinger, Sherman

Marine propulsion

Oscillating propelling means

416 83, 440 14, B63H 136

Patent

active

054011965

ABSTRACT:
A propulsion system for use in a fluid, the system utilizing at least one foil which is both oscillated at a frequency f with an amplitude a in a direction substantially transverse to the propulsion direction and flapped or pitched about a pivot point to change the foil pitch angle to the selected direction of motion with a smooth periodic motion. Parameters of the system including Strouhal number, angle of attack, ratio of the distance to the foil pivot point from the leading edge of the foil to the chord length, the ratio of the amplitude of oscillation to the foil chord width and the phase angle between heave and pitch are all selected so as to optimize the drive efficiency of the foil system.

REFERENCES:
patent: 4490119 (1984-12-01), Young
patent: 5000706 (1991-03-01), Wang
patent: 5021015 (1991-06-01), Wang
M. S. Triantafyllou, et al, Wake Mechanics for Thrust Generation in Oscillating Foils, Dec. 1991, pp. 2835-2837, American Institute of Physics, Phys. Fluids A3 (12).
G. S. Triantafyliou, et al, Optimal Thrust Development in Oscillating Foils with Application to Fish Propulsion, pp. 205-224, Journal of Fluids and Structures 1993.

Affiliated with

Also associated with

Rating

Propulsion mechanism employing flapping foils does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Propulsion mechanism employing flapping foils, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Propulsion mechanism employing flapping foils will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2246817