Transcription of Chapter 7 Resistance and Powering of Ships
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Chapter 7 Resistance and Powering of Ships
I COURSE OBJECTIVES Chapter 7 7. Resistance AND Powering OF Ships 1. Define effective horsepower (EHP) conceptually and mathematically 2. State the relationship between velocity and total Resistance , and velocity and effective horsepower 3. Write an equation for total hull Resistance as a sum of viscous Resistance , wave making Resistance and correlation Resistance . Explain each of these resistive terms. 4. Draw and explain the flow of water around a moving ship showing the laminar flow region, turbulent flow region, and separated flow region 5. Draw the transverse and longitudinal wave patterns when a displacement ship moves through the water 6.
The development of iron hull construction produced radical changes in hull strength and hull design. Gone were the blunt bows and full hull forms of early sailing vessels. Capitalizing on the added strength of iron hulls, naval architects could design ships with finer bows and as a result, ship speeds increased.
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