On the Use of Vortex Flows for the Propulsion of Micro-Air and Sea Vehicles
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Authors
Jones, K.D.
Platzer, M.F.
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Date of Issue
2001
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2001
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Abstract
Recent interest in flapping-wing propulsion, in particular for hovering or low-speed flight of micro air vehicles, has led to a renewed interest in the measurement and prediction of unsteady, vortex-dominated flows. The proposed vehicles operate at Reynolds numbers below 20,000, and operate with mildly to fully separated flow throughout the flapping cycle. This paper provides a brief history on the topic, and summarizes research efforts at the Naval Postgraduate School over the last decade, demonstrating the current numerical and experimental capabilities, and indicating areas where further work is required. Specifically, several wind and water tunnel experiments are described where the vortex structures generated by single flapping foils and by two foils arranged in a biplane configuration were visualized and thrust was measured as a function of flapping amplitude and frequency. Additional experiments are reported which show the potential of flapping foils to energize flat-plate boundary layers and to suppress or reduce regions of flow separation. Two- and three-dimensional panel code code and two-dimensional Navier-Stokes computations are also described to analyze these flapping-foil experiments.
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Conference Paper
Description
Proceedings of the Applied Vehicle Technology Panel, AVT Paper No. 40, Loen, Norway, May 2001.
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Department of Mechanical and Aerospace Engineering
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Citation
Jones, K.D. and Platzer, M.F., "On the Use of Vortex Flows for the Propulsion of Micro-Air and Sea Vehicles," Proceedings of the Applied Vehicle Technology Panel, AVT Paper No. 40, Loen, Norway, May 2001.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.