Comparison of Analytic and Wind Tunnel Results.pdf

Project Assignment #2
Comparison of Analytic and Wind Tunnel Results
Due: October 5 at the end of lab
Prof. David L. Darmofal
Department of Aeronautics and Astronautics
Massachusetts Institute of Technology
September 29, 2005
1 Objective
The objective of this project assignment is pare analytic estimates of aerodynamic perfor­
mance (as performed in Project Assignment #1) to wind tunnel data for the BWB. In the process,
the raw wind tunnel data will be corrected for effects due to the wind tunnel mounts and walls,
and reduced into a non-dimensional form.
2 Data & Matlab Scripts
Table 1 contains geometric data for the full-scale BWB. Table 2 contains data for the wind tunnel.
Symbol Parameter Value
2
Sref Reference Area (trapezoidal wing) 7,840 ft
2
Swet Wetted Area 31,324 ft
b Wing span 280 ft
cmac Mean aerodynamic chord ft
Table 1: Geometric data for full-scale BWB
Symbol Parameter Value
Model scale 1/47
U� freestream velocity 50 and 100 mph
Table 2: Wind tunnel data
Raw Wind Tunnel Data
The necessary wind tunnel data for the 50 and 100 mph tests is available in an archive file on the
MIT Server. The data files are named WBWT and WBWT . If you would
like to use Matlab for the data analysis, the script can be used. If you would prefer
to use a spreadsheet (