Aerodays 2011 - Transport Research & Innovation Portal
Aerodays 2011 - Transport Research & Innovation Portal
Aerodays 2011 - Transport Research & Innovation Portal
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<strong>Aerodays</strong> <strong>2011</strong> - REMFI<br />
WP2<br />
Empennage improved control surfaces efficiency<br />
March <strong>2011</strong><br />
Prediction of<br />
gap effects<br />
• Highly time consuming.<br />
• Tendencies (Re, M, gap) well predicted (similar<br />
deltas values compared with WTT)<br />
• The better aero solution is always the gap sealed<br />
one.<br />
• Gaps geometry need to be perfectly represented<br />
(aircraft deformation needed)<br />
• Reynolds effects on gaps are important.<br />
FUSELAGE/ELEVATOR GAP<br />
Sealed/Unsealed<br />
SHROUD GAP<br />
Always closed<br />
Elevator/rudder<br />
efficiency<br />
• Small transition influence. Mach-dependence d more<br />
pronounced.<br />
• Important influence of Reynolds number on results<br />
(till 15%)<br />
• Good comparison between WT and CFD results in<br />
linear range. Better comparison at higher Re.<br />
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