(a)
The towing power if the cylinder is parallel to tow direction.
Answer to Problem 7.55P
Explanation of Solution
Given information:
The diameter of the cylinder is equal to
The length of the cylinder is
The velocity is equal to
The fluid is water at
The power
Where,
The drag force is defined as,
In above equation,
The Reynolds’s based on length number is defined as,
Where,
Assume, the water at
Calculation:
Calculate the Reynolds’s number,
According to the definitions, the drag co-efficient is equal to
Calculate the drag force,
Calculate the power,
Conclusion:
The towing power required when the cylinder is parallel to the tow direction is equal to
(b)
The towing power if the cylinder is normal to tow direction.
Answer to Problem 7.55P
Explanation of Solution
Given information:
The diameter of the cylinder is equal to
The length of the cylinder is
The velocity is equal to
The fluid is water at
The power
Where,
The drag force is defined as,
In above equation,
The Reynolds’s based on length number is defined as,
Where,
Assume, the water at
Calculation:
Calculate the Reynolds’s number,
According to the definitions, the drag co-efficient is equal to
Calculate the drag force,
Calculate the power,
Conclusion:
The towing power required when the cylinder is normal to the tow direction is equal to
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Chapter 7 Solutions
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