Page 48 - Computational Fluid Dynamics for Engineers

1.4 Prediction of Aircraft Performance Degradation Due to Icing 33

1.2

1.0

0.8 calc. : clean
— calc. : all iced
o exp. : all iced
0.6
- calc. : wings deiced
• exp. : wings deiced
0.4

0.2 j . i
4 8 10
(a) a

1.2 1.2

1.0 1.0

0.8 0.8

0.6 0.6

0.4 0.4

0.2 J i L JL 0.2 J , L _L_ J . I
2 4 6 8 10 -2 0 2 4 6 8 10
a a
(b) (C)
Fig. 1.33. Comparison of calculated and measured airplane lift coefficient for (a) rime ice
(flight (83-11), (b) mixed ice (flight 84-34), and (c) glaze ice (flight 84-27).
0.025 0.025
calc. : clean
o exp. : clean
-
calc. : all iced
• exp. : all iced
0.020 0.020 -
Cd o
/ m O''
/ o 0''
0.015 0.015 — / O.--'
K ^ CM °-••' o
- & • • • • * ' " °
0.010 0.010 , 1 O, | , 1 , 1 1 1 I 1
-2.0 0.0 2.0 4.0 6.0 8.0 10.0 -2.0 0.0 2.0 4.0 6.0 8.0 10.0
a a
(a) (b)
Fig. 1.34. Increase in section drag coefficient due to (a) rime ice (flight 85-17), and (b)
mixed ice (flight 85-24a).