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The Delft Sand, Clay & Rock Cutting Model, 2019a

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<strong>Clay</strong> <strong>Cutting</strong> Charts.<br />

V.3 <strong>The</strong> Curling Type.<br />

8<br />

Ratio h b /h i vs. Blade Angle α<br />

at Transition of Flow Type/Curling Type<br />

a/c=1.0<br />

7<br />

6<br />

a/c=0.9<br />

a/c=0.8<br />

a/c=0.7<br />

Ratio h b /h i (-)<br />

5<br />

4<br />

3<br />

a/c=0.6<br />

a/c=0.5<br />

a/c=0.4<br />

a/c=0.3<br />

2<br />

a/c=0.2<br />

1<br />

a/c=0.1<br />

0<br />

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180<br />

Blade Angle α (Degrees)<br />

a/c=0.0<br />

© S.A.M.<br />

Figure V-12: <strong>The</strong> ratio hb/hi at the transition Flow Type/Curling Type.<br />

Shear Angle β vs. Blade Angle α<br />

100<br />

Shear Angle β (Degrees)<br />

95<br />

90<br />

85<br />

80<br />

75<br />

70<br />

65<br />

60<br />

55<br />

50<br />

45<br />

40<br />

35<br />

30<br />

25<br />

20<br />

15<br />

10<br />

5<br />

0<br />

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180<br />

Blade Angle α (Degrees)<br />

a/c=1.0<br />

a/c=0.9<br />

a/c=0.8<br />

a/c=0.7<br />

a/c=0.6<br />

a/c=0.5<br />

a/c=0.4<br />

a/c=0.3<br />

a/c=0.2<br />

a/c=0.1<br />

a/c=0.0<br />

© S.A.M.<br />

Figure V-13: <strong>The</strong> shear angle for the Curling Type<br />

Copyright © Dr.ir. S.A. Miedema TOC Page V-135 of 228

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