A ship is 150 m long and has a wetted area of 5000 m2.If it is encrusted with barnacles, the ship requires 7000 hpto overcome friction drag when moving in seawater at 15 kn and 20°C. What is the average roughness of thebarnacles? How fast would the ship move with the samepower if the surface were smooth? Neglect wave drag.

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Q: A ship is 150 m long and has a wetted area of 5000 m2. If it is encrusted with barnacles, the ship…

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Q: Assume the stabilizer of an airplane is a flat plate. If the   transition /critical RN 750,000, what…

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Q: Assume the stabilizer of an airplane is a flat plate. If the   transition /critical RN 750,000, what…

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Metrology of surface finish

In general terms, the application of scientific principles in the study of measurements is known as metrology. When speaking about measurement, it could be of time, length, microstructures, grain structures, internal crystal discontinuities, surface roughness, measurements of angles, height, width, and so on. While coming to the domain of mechanical engineering, metrology is considered the science of measurements of surface finish, length, surface texture, and angles.