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An embedded mesh procedure for leading-edge vortex flowsA cell-vertex scheme is outlined for solving the flow about a delta wing with M (sub infinity) is greater than 1. Embedded regions of mesh refinement allow solutions to be obtained which have much higher resolution than those achieved to date. Effects of mesh refinement and artificial viscosity on the solutions are studied, to determine at what point leading-edge vortex solutions are grid-converged. A macroscale and a microscale for the size of the vortex are defined, and it is shown that the macroscale (which includes the wing surface properties) is converged on a moderately refined grid, while the microscale is very sensitive to grid spacing. The level of numerical diffusion in the core of the vortex is found to be substantial. Comparisons with the experiment are made for two cases which have transonic cross-flow velocities.
Document ID
19890011565
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Powell, Kenneth G. (Michigan Univ. Ann Arbor., United States)
Murman, Earll M. (Massachusetts Inst. of Tech. Cambridge., United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1989
Publication Information
Publication: NASA, Langley Research Center, Transonic Symposium: Theory, Application, and Experiment, Volume 1, Part 1
Subject Category
Aerodynamics
Accession Number
89N20936
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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