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Optimizing the Forces and Propulsive Efficiency in Bird-Scale Flapping Flight

Paranjape, Aditya A. and Chung, Soon-Jo and Hilton, Harry H. (2013) Optimizing the Forces and Propulsive Efficiency in Bird-Scale Flapping Flight. In: AIAA Atmospheric Flight Mechanics Conference 2013. American Institute of Aeronautics and Astronautics (AIAA) , Reston, VA, Art. No.-2013.

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This paper presents first-principle and numerical studies of flapping flight with the objective of optimizing the force production and propulsive effciency. Strouhal number is identified as a critical parameter affecting all of these variables, and the optimum ranges of Strouhal number are calculated. The results of the calculations, in particular, explain why a value in the range of 0.2-0.4 is usually preferred by nature's flyers. Next, an attempt is made to quantify the effects of wing flexibility on force generation and propulsive efficiency, and it is shown that there exists a critical value of wing elasticity at which propulsive efficiency is maximized, and moreover, this value is driven primarily by the dynamics of the bending motion of the wing rather than twisting.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Paranjape, Aditya A.0000-0002-3164-3215
Chung, Soon-Jo0000-0002-6657-3907
Additional Information:© 2013 AIAA American Institute of Aeronautics and Astronautics. Support by the National Science Foundation (IIS-1253758) and the Private Sector Program Division of the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign is gratefully acknowledged.
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University of Illinois Urbana-ChampaignUNSPECIFIED
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AIAA Paper2013-4916
Record Number:CaltechAUTHORS:20161129-102652656
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Official Citation:Aditya A. Paranjape, Soon-Jo Chung, and Harry Hilton. "Optimizing the Forces and Propulsive Efficiency in Bird-Scale Flapping Flight", AIAA Atmospheric Flight Mechanics (AFM) Conference, Guidance, Navigation, and Control and Co-located Conferences, (AIAA 2013-4916)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72396
Deposited By: Ruth Sustaita
Deposited On:29 Nov 2016 20:17
Last Modified:09 Mar 2020 13:19

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