Answered: A hydrofoil 50 cm long and 4 m wide…

A hydrofoil 50 cm long and 4 m wide moves at 28 kn inseawater at 20°C. Using fl at-plate theory with Retr= 5 E5,estimate its drag, in N, for (a) a smooth wall and (b) arough wall, ε = 0.3 mm.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.29P: Air at 20C flows at 1 m/s between two parallel flat plates spaced 5 cm apart. Estimate the distance...

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Question

A hydrofoil 50 cm long and 4 m wide moves at 28 kn in
seawater at 20°C. Using fl at-plate theory with Retr= 5 E5,
estimate its drag, in N, for (a) a smooth wall and (b) a
rough wall, ε = 0.3 mm.

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