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Five Years Experience with Minimum Induced Loss Propellers - Part I: Theory
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English
Abstract
Minimum induced loss propellers (and windmills) are the rotor analogues of elliptically loaded wings, characterized by minimum kinetic energy loss for a specified disc loading, number of blades, and flight (or wind) speed; they approximate most nearly an “actuator disc,” given the constraints of single rotation and blade number. Beginning in 1979 the author, his students, friends, and clients have produced a series of surprisingly efficient propellers (and anti-propellers) for various applications ranging from the CHRYSALIS and GOSSAMER ALBATROSS human powered airplanes to 50 kW horizontal axis wind turbines. Minimum induced loss rotor design may be carried out readily with a pocket scientific calculator, but off-design performance prediction requires something more, for instance the HELICE code and a small computer. Design and performance algorithms are given in Part I. A brief account of some applications is given in a companion paper with the subtitle Part II - Applications.
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Citation
Larrabee, E., "Five Years Experience with Minimum Induced Loss Propellers - Part I: Theory," SAE Technical Paper 840026, 1984, https://doi.org/10.4271/840026.Also In
References
- Airplane Propellers Glauert. Herman IV “Aerodynamic Theory” Durand Springer-Verlag 1935
- Luftschrauben mit geringstem Energieverlust Betz Albert Prandtl Ludwig Reports of the Aerodynamics Research Institute at Goettingen 1919
- On the Vortex Theory of Screw Propellers Goldstein Sidney Proceedings of the Royal Society, Series A 123 London 1929
- Propellers of Minimum Induced Loss, and Water Tunnel Tests of Such a Propeller Larrabee E. Eugene Proceedings of the NASA-Industry-University Drag Reduction Workshop 1975 University of Kansas Lawrence, Kansas 273 292
- A Vortex Wake Analysis of a Horizontal-Axis Wind Turbine and a Comparison with a Modified Blade Element Theory Anderson Michael Proceedings 3rd International Symposium on Wind Energy Systems Copenhagen August 1980 BERA Fluid Engineering
- Minimum Induced Loss Windmills and Propellers Larrabee E. Eugene French Susan E. Proceedings of the 6th International Conference on Wind Engineering held in Brisbane Australia 21-25 March Auckland, N.Z. 5-7 April 3
- Theory of Propellers Theodorsen Theodore McGraw-Hill Book Company, Inc. New York 1948