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Viewing report
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Aerodynamic measurements of the landing gear. Edition No. 1
VDM Publishing House, July 2009, Pages: 120
Aerodynamic measurements were taken over models of
the Boeing 777 high fidelity isolated landing gear at
a free-stream Mach number of 0.16. Noise control
devices (NCD) were developed at Virginia Tech to
reduce noise by shielding gear components, reducing
wake interactions and by streamlining the flow around
certain landing gear components. Aerodynamic
measurements were performed to understand the flow
over the landing gear and also changes in the flow
between ‘Baseline’ and ‘NCD’ configurations (without
and with Noise Control Devices respectively).
Hot-film, Pitot-static measurements and flow
visualization using tufts were performed over an
isolated 26% scale-model high fidelity landing gear
for the ‘Baseline’ and ‘NCD’ configurations. Contours
of turbulence intensity, normalized wake velocity and
normalized total pressure loss for both
configurations are compared. The ‘Baseline’
configuration was also compared with the NASA Ames
study. Hot-film measurements are also compared to
Microphone Phased Array results which were acquired
at Virginia Tech. A novel technique for processing
hot-film measurements by breaking turbulence into
octave bands as acoustic measurements is presented.
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