Investigation of Transonic Drag Computations in Aerodynamic ...
Investigation of Transonic Drag Computations in Aerodynamic ...
Investigation of Transonic Drag Computations in Aerodynamic ...
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<strong>Investigation</strong> <strong>of</strong> <strong>Transonic</strong> <strong>Drag</strong> <strong>Computations</strong> <strong>in</strong> APAS<br />
Trial 3 (F1 & W1)<br />
0.05<br />
0.045<br />
0.04<br />
0.035<br />
Total <strong>Drag</strong><br />
Total <strong>Drag</strong> - W avedrag<br />
0.03<br />
Cd<br />
0.025<br />
0.02<br />
0.015<br />
0.01<br />
0.005<br />
0<br />
0.8 0.85 0.9 0.95 1 1.05 1.1 1.15 1.2<br />
Mach #<br />
Figure 18. Trial 3 APAS Results, With & Without Wave <strong>Drag</strong><br />
The addition <strong>of</strong> a w<strong>in</strong>g does not seem to affect the fact that there is no transonic<br />
drag rise without wave drag, nor is any wave drag generated below Mach 1. The drag<br />
coefficient for the w<strong>in</strong>g 2 configuration is slightly higher than that <strong>of</strong> the w<strong>in</strong>g 1<br />
configuration, although actual drag is higher for the w<strong>in</strong>g 1 configuration.<br />
Trial 4 (F1 & W2)<br />
Cd<br />
0.05<br />
0.045<br />
Total <strong>Drag</strong><br />
0.04<br />
Total <strong>Drag</strong> - Wave <strong>Drag</strong><br />
0.035<br />
0.03<br />
0.025<br />
0.02<br />
0.015<br />
0.01<br />
0.005<br />
0<br />
0.8 0.85 0.9 0.95 1 1.05 1.1 1.15 1.2<br />
Mach #<br />
Figure 19. Trial 4 APAS Results, With & Without Wave <strong>Drag</strong><br />
Jeff Miller 18
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