22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-3.10.3
REQUIREMENTS FOR SUBSCALE SIMULATION OF DELTA-WING VORTEX CHARACTERISTICS
L. E. Ericsson (1), M. E. Beyers (2)
(1) Mountain View, California 94040, USA;
(2) Institute for Aerospace Research, NRC, Ottawa, Ontario, Canada
Keywords: delta-wing, vortex characteristics, subscale simulation
A review of published experimental results for
delta-wing configurations shows that the
measured vortex characteristics can differ
greatly between the various tests. An analysis
reveals that there are two reasons for the
observed differences, i.e. 1) dissimilar simulation
capabilities, determined by the achievable
Reynolds number and the relative severity of the
ground facility interference in the test facilities
used, and 2) differences in geometric details
between the tested models. These factors are
usually interconnected as they have their origins
in the difficulties in supporting a pure delta wing
without essentially changing its geometry,
difficulties aggravated by the need for
maximizing the model scale to achieve the
highest possible test Reynolds number. It is found
that modest changes in the model scale and/or
test conditions can often reduce these problems
to a manageable level.
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