Investigation of Transonic Drag Computations in Aerodynamic ...

Investigation of Transonic Drag Computations in APAS
Trial 1 WAVDRAG
Area (ft 2 )
90
80
70
60
50
40
30
20
10
0
0 20 40 60 80 100
x location (ft)
Figure 34. WAVDRAG Area Build-up for Trial 1
The shape of the area build-up for the trial 1 configuration in WAVDRAG is
shown in Figure 34. WAVDRAG outputs the area build-up as the average of that of the
areas obtained from the cutting planes at each roll angle θ. The curve is of the same
shape as the APAS build-up, which demonstrates that the two programs are analyzing the
same configuration and are generating similar, if not identical, sets of equivalent bodies.
The maximum area reached in the WAVDRAG figure is that of a circle with a radius of 5
ft, which is the maximum cross-sectional area of trial 1.
Jeff Miller 30