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Hybrid Computational-Fluid-Dynamics Platform to Investigate Aircraft Trailing Vortices
University of Cape Town, Cape Town, South Africa.
University of Cape Town, Cape Town, South Africa.
Linköping University, Department of Mathematics, Computational Mathematics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-7972-6183
2019 (English)In: Journal of Aircraft, ISSN 0021-8669, E-ISSN 1533-3868, Vol. 56, no 1, p. 344-355Article in journal (Refereed) Published
Abstract [en]

This paper outlines the development of a parallel three-dimensional hybrid finite volume finite difference capability. The specific application area under consideration is modeling the trailing vortices shed from the wings of aircraft under transonic flight conditions. For this purpose, the Elemental finite volume code is employed in the vicinity of the aircraft, whereas the ESSENSE finite difference software is employed to accurately resolve the trailing vortices. The former method is spatially formally second-order, and the latter is set to sixth-order accuracy. The coupling of the two methods is achieved in a stable manner through the use of summation-by-parts operators and weak imposition of boundary conditions using simultaneous approximation terms. The developed hybrid solver is successfully validated against an analytical test case. This is followed by demonstrating the ability to model the flowfield, including trailing vortex structures, around the NASA Common Research Model under transonic flow conditions. The interface treatment is shown to describe the intersecting vortices in a smooth manner. In addition, insights gained in resolving the vortices include violation of underlying assumptions of analytical vortex modeling methods.

Place, publisher, year, edition, pages
2019. Vol. 56, no 1, p. 344-355
National Category
Mathematics
Identifiers
URN: urn:nbn:se:liu:diva-154397DOI: 10.2514/1.C035022OAI: oai:DiVA.org:liu-154397DiVA, id: diva2:1287409
Available from: 2019-02-11 Created: 2019-02-11 Last updated: 2019-02-11

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