Hybrid Computational-Fluid-Dynamics Platform to Investigate Aircraft Trailing Vortices

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Changfoot, Donovan M.University of Cape Town, Cape Town, South Africa (author)

Hybrid Computational-Fluid-Dynamics Platform to Investigate Aircraft Trailing Vortices

Article/chapterEnglish2019

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2019
electronicrdacarrier

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LIBRIS-ID:oai:DiVA.org:liu-154397
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-154397URI
https://doi.org/10.2514/1.C035022DOI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype

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Funding agencies: National Aerospace Centre of the University of Witwatersrand, Johannesburg; South African Research (SARChI) Chair in Industrial CFD - Department of Science and Technology; South African Research (SARChI) Chair in Industrial CFD - National Research Foundation
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.

Subject headings and genre

NATURVETENSKAP Matematik hsv//swe
NATURAL SCIENCES Mathematics hsv//eng

Added entries (persons, corporate bodies, meetings, titles ...)

Malan, Arnaud GUniversity of Cape Town, Cape Town, South Africa (author)
Nordström, Jan,1953-Linköpings universitet,Beräkningsmatematik,Tekniska fakulteten(Swepub:liu)janno11 (author)
University of Cape Town, Cape Town, South AfricaBeräkningsmatematik (creator_code:org_t)

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In:Journal of Aircraft56:1, s. 344-3550021-86691533-3868

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NATURAL SCIENCES: NATURAL SCIENCES; and Mathematics

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By the university: Linköping University

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