Question

Which blades are attached to rotor or spindle

Answer 1

Answer:

An example of noise at blade passage frequency as well as at higher frequencies is provided by Lovik and Vassenden [13] for the pressures measured on the hull section of an oceanographic research ship just above the propeller. Fig. 1.21 is an illustration of the model test configuration for simulating flow into the propeller of Ref. [13] as well as an example of the pressure levels on the hull (at the location of the heavy dot) at a ship speed of 12.2 knots for two alternate propeller designs. In each case, a full scale and a scaled model result are shown; the diameter of each model propeller was 255 mm, with a scale factor of 10. The measurements of noise from the models were scaled to full scale using Eq. (1.19a,b), which ignores differences between (Ki)model and (Ki)ship and furthermore is subject to the caveats of Section 1.2.2 because it ignores requirements of similarity in compressibility. For propellers we shall define

Answer 2

Answer:

The rotor has blades fixed on a spindle. These blades impel air rearward in the same manner as a propeller because of their angle and airfoil contour.

Explanation:

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