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Blade shapes are geometrically similar for prescribed geometry

The Reynolds numbers for the blades are

Re L,1 = ( V L / 1 1 ν ) = 15/ Re L,2 = (
= 15/ .
Re L,1 = Re L,2 . Also, Pr 1 = Pr . 2

h 2 =

L
L 1

T∞ )

.

Hence, the heat rate for the second blade is

q = h A 2 ( T s,2 T∞ ) =
T∞ )
2 2

) ( 1500 W )

T∞ )

1

q = T s,2 T∞ q 1 = ( 400
35
2 T s,1 T∞ ( 300 35
<
q 2 =

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