Fuel efficiency of aircraft is of great importance to the military
and private sector. A more efficient wing design for UAVs would
lead to improvements in mission support while reducing fuel costs
for the Air Force. An experimental investigation of one candidate
design, the Houck Aircraft Configuration, has been conducted in the
AFIT low speed wind tunnel. This aircraft shares similarities to
other joined-wing aircraft, but includes curved flow-guides of
varying spanwise camber connecting the upper and lower wingtips.
Experimental results show that the addition of flow guides on the
24" Houck Configuration results in a 2.5% reduction in L/Dmax at Re
H 80K and a 0.3% reduction in L/Dmax at Re H 125K. This trend shows
a decrease in the performance gap as the Reynolds number increases
from 80K to 125K. It is recommended that additional testing at
higher Reynolds numbers be performed to determine if an increase in
performance can be shown. The designed flow guides proved to be
successful in combining the upper and lower wing-tip vortices into
a single vortex. The flow guides alter what would be two smaller
compact vortices and instead produce a slightly larger, spread out
vortex which follows the curve of the flow guide. Ultimately,
evidence of improvements in aerodynamic efficiency will need to be
shown before other claims of the design are demonstrated to be
fully successful.
General
| Imprint: |
Biblioscholar
|
| Country of origin: |
United States |
| Release date: |
November 2012 |
| First published: |
November 2012 |
| Authors: |
Michael M. Walker
|
| Dimensions: |
246 x 189 x 8mm (L x W x T) |
| Format: |
Paperback - Trade
|
| Pages: |
156 |
| ISBN-13: |
978-1-288-33255-7 |
| Categories: |
Books >
Social sciences >
Education >
General
Promotions
|
| LSN: |
1-288-33255-6 |
| Barcode: |
9781288332557 |
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