Title page for ETD etd-06122010-020242
|Type of Document
||Fahrner, Carl Jerome
||An experimental investigation of fluid dynamic interference forces.
||Master of Science
||Engineering Science and Mechanics
|Telionis, Demetri P.
|Kaiser, John E. Jr.
|Stinchcomb, Wayne W.
|Date of Defense
Experimental investigations have been conducted in
the VPI & SU towing basin to assess the feasibility of
testing fully submerged configurations, simulating
aerodynamic phenomena, and in particular, measuring
aerodynamic interference force between blunt bodies.
S~ecial instrumented struts were constructed and
calibrated for the measurement of drag and side forces.
A series of tests were conducted with spherical models in
order to verify the reliability of the method by
comparison with earlier classical results. The effects
of flat walls and surface wave formation were studied and
it was discovered that their influence on aerodynamic
forces is reduced to less than 10% if the body is removed
from the wall or the surface by a distance larger than
half its typical widtho Experiments were also conducted
with crude models that approximate the shapes of a
passenger car and a truck. In particular, the passing
process under the presence of a strong wind was simulated
by towing the models at an angle of 240 with respect to
motion of the carriage. The results appear to be
essentially in agreement with the data received with
much larger models tested in air, by other investigators.
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