A submarine can be treated as an ellipsoid with a diameter of 5 m and a length of 25 m. The submarine is cruising horizontally and steadily at 65 km/h in seawater (p = 1025 kg/m2, p 0.00108 Ns/m2). %3D Determine: i. The Reynolds number for the submarine and state whether the flow is in the laminar or turbulent regime. ii. The drag force on the submarine. iii. The power required to overcome the drag force. To surface, a total lift force of 1000 kN is required from a pair of NACA 0012 hydroplanes. Each hydroplane has a chord length of 1 m and a iv. span of 3 m. What angle of attack should be used?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A submarine can be treated as an ellipsoid with a diameter of 5 m and a length of
25 m. The submarine is cruising horizontally and steadily at 65 km/h in seawater
(p = 1025 kg/m³.p = 0.00108 Ns/m2).
Determine:
The Reynolds number for the submarine and state whether the flow is in the
laminar or turbulent regime.
ii.
The drag force on the submarine.
iii.
The power required to overcome the drag force.
To surface, a total lift force of 1000 kN is required from a pair of
NACA 0012 hydroplanes. Each hydroplane has a chord length of 1 m and a
iv.
span of 3 m. What angle of attack should be used?
Transcribed Image Text:A submarine can be treated as an ellipsoid with a diameter of 5 m and a length of 25 m. The submarine is cruising horizontally and steadily at 65 km/h in seawater (p = 1025 kg/m³.p = 0.00108 Ns/m2). Determine: The Reynolds number for the submarine and state whether the flow is in the laminar or turbulent regime. ii. The drag force on the submarine. iii. The power required to overcome the drag force. To surface, a total lift force of 1000 kN is required from a pair of NACA 0012 hydroplanes. Each hydroplane has a chord length of 1 m and a iv. span of 3 m. What angle of attack should be used?
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