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SUMMARY:Mechanisms for Model Scale Landing Gear Noise Generation - Alexand
 er Quayle
DTSTART:20080516T110000Z
DTEND:20080516T120000Z
UID:TALK12170@talks.cam.ac.uk
CONTACT:8442
DESCRIPTION:Landing gear models are examined at 1/12th scale to determine 
 the main noise generating features on simplified\, four-wheel bogies align
 ed with the flow. Previous experiments have indicated that changes to whee
 l shape and model layout can have substantial effects on model noise. In t
 his paper we explain these changes in noise level and present surface oil 
 visualization of the mean flow for different wheel shapes. Acoustic measur
 ements describe the noise generated by major components of the landing gea
 r model and identify sources at the wheel edges\, rear axle and oleo/beam 
 junction. The most important noise sources were the result of wake-body in
 teractions and we present changes to the wheel shape\, layout of the landi
 ng gear and local fairings as successful methods of noise reduction. Resul
 ts suggest that modest changes in design could yield a much more stable fl
 ow over the landing gear\, substantially reducing noise generated by all c
 omponents.
LOCATION:Language Unit Meeting Room
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