In the Fan Laws experiment the cross section of the duct was

In the \"Fan Laws\" experiment, the cross section of the duct was divided into 5 equal concentric areas. Each area was represented by one point (points 1 through 5). The dynamic pressures at these 5 points are: 0.82, 0.80, 0.72, 0.62 and 0.46 inches of water. The dynamic pressure at the duct center is 0.85 inches of water. The mean velocity and the center coefficient values are respectively: (Use air density = 0.00237 slugs/ft^3, and water density = 1.98 sulgs/ft^3) 56.2 0.91 48.2 0.78 61.7 1.00 45.2 0.62

Solution

i) What material properties should an engineer focus on to cope with the high rotational speed and high blade loading?

ii) What is the expression for the \"flow coefficient\"?

iii) What is the expression for \"stage loading coefficient\"?

iv) Given a turbine row with constant axial velocity of 150m/s at 5000 rpm on a mean radius of 0.7m and an absolute flow an absolute flow angle at exit from the stator of 70°. The turbine operates with axial leaving flow and is a repeating stage. Calculate the flow coefficient and the stage loading coefficient.

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