High-order accurate simulations of wake and tip vortex flowfields

Christopher M. Hall, Lyle Norman Long

Research output: Contribution to journalConference article

15 Scopus citations

Abstract

This paper presents an application of a high-order unsteady computational fluid dynamics algorithm to the simulation of flows dominated by vorticity. The algorithm, possessing fourth-order accuracy in both space and time, has been known to demonstrate low dissipation for unsteady flowfields. A three-dimensional Euler solver has been developed around this method, which has been used to simulate both a passive vortex and the near-wake development of a fixed wing. The effects of grid uniformity and resolution on the severity of numerical dissipation have been investigated. The near-wake simulations are compared with simulations using CFL3D, a well-known NASA CFD code. The lower numerical dissipation of the present simulation is shown to produce a stronger tip vortex that follows a trajectory closer to the experimental data.

Original languageEnglish (US)
Pages (from-to)1984-1997
Number of pages14
JournalAnnual Forum Proceedings - American Helicopter Society
Volume2
StatePublished - Jan 1 1999
EventProceedings of the 1999 55th Annual Forum of the American Helicopter Society, FORUM 55 - Montreal, Que., Can
Duration: May 25 1999May 27 1999

All Science Journal Classification (ASJC) codes

  • Transportation
  • Aerospace Engineering

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