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dc.contributor.authorDorfling, Johann
dc.contributor.authorRokhsaz, Kamran
dc.identifier.citationJohann Dorfling and Kamran Rokhsaz. "Constrained and Unconstrained Propeller Blade Optimization", Journal of Aircraft, Vol. 52, Special Section on Second High Lift Prediction Workshop (2015), pp. 1179-1188en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractPropeller optimization by means of calculus of variations is addressed in this paper. A procedure for deriving the Euler-Lagrange equations for both unconstrained and constrained propeller blade-twist optimization is presented. This same procedure can be followed to optimize other geometric parameters, but blade twist is considered here to investigate the feasibility of a variable-twist propeller blade. Results from unconstrained twist optimization show that, regardless of the operating condition (takeoff, climb, or cruise), the maximum efficiency occurs at significantly lower power coefficients than what a propeller will be required to absorb. Constrained optimization supports this observation by showing that, for each operating condition, a power constraint lowers the propeller efficiency. Twist distributions obtained from constrained optimization for each of the three operating conditions differ significantly from one another, but it is shown that the effect on performance is insignificant. This leads to the conclusion that a variable-twist propeller would not be beneficial for a typical aircraft mission. For the case of a loiter-dash-type mission profile, however, analysis shows that a variable-twist propeller blade is indeed feasible.en_US
dc.publisherAmerican Institute of Aeronautics and Astronauticsen_US
dc.relation.ispartofseriesJournal of Aircraft;v.52:no.4
dc.titleConstrained and unconstrained propeller blade optimizationen_US
dc.rights.holder©2015 AIAAen_US

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  • AE Research Publications [111]
    Research publications authored by the Department of Aerospace Engineering faculty and graduate students.

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