Higher-order free-wake method for propeller-wing systems

Julia A. Cole, Mark David Maughmer, Michael P. Kinzel, Götz Bramesfeld

Research output: Contribution to journalArticle

Abstract

A higher-order free-wake (HOFW) method has been developed to enable conceptual design-space explorations of propeller-wing systems. The method uses higher-order vorticity elements to represent the wings and propeller blades as lifting surfaces. The higher-order elements allow for improved force resolution and more intrinsically computationally stable wakes than a comparable vortex-lattice method, while retaining the relative ease of geometric representation inherent to such methods. The propeller and wing surfaces and wakes are modeled within the same flowfield, thus accounting for mutual interaction without the need for empirical models. Time-averaged results found using the HOFW method are compared with experimental propeller, proprotor, and propeller-wing system data, along with two semi-empirical methods. The results show that the method is well suited for performance prediction of lightly loaded propellers/proprotors and propeller-wing systems and can successfully predict design trends. In addition, the time required to define a geometry and solve for the flowfield with the HOFW method as compared to that required with a computational fluid dynamics method make it particularly useful for design-space exploration. These strengths were highlighted through a sample design study on a generic distributed propulsion vehicle.

Original languageEnglish (US)
Pages (from-to)150-165
Number of pages16
JournalJournal of Aircraft
Volume56
Issue number1
DOIs
StatePublished - Jan 1 2019

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Propellers
Conceptual design
Vorticity
Propulsion
Computational fluid dynamics
Vortex flow
Geometry

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

Cole, Julia A. ; Maughmer, Mark David ; Kinzel, Michael P. ; Bramesfeld, Götz. / Higher-order free-wake method for propeller-wing systems. In: Journal of Aircraft. 2019 ; Vol. 56, No. 1. pp. 150-165.
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Higher-order free-wake method for propeller-wing systems. / Cole, Julia A.; Maughmer, Mark David; Kinzel, Michael P.; Bramesfeld, Götz.

In: Journal of Aircraft, Vol. 56, No. 1, 01.01.2019, p. 150-165.

Research output: Contribution to journalArticle

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