Ps5 - 2.23 Hydrofoils Propellers Homework Assignment#5 Assigned Friday April 6 2007 Due Friday Apr 13 2007 1 A two-dimensional hydrofoil section is

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2.23 Hydrofoils & Propellers Homework Assignment #5 Assigned: Friday April 6, 2007 Due: Friday Apr. 13, 2007 1) A two-dimensional hydrofoil section is to be designed to achieve proper lift and cavitation performance using Brockett diagrams. The foil section is to be designed with a NACA 6t thickness form ans a NACA a=0.8 meanline. It is to be designed to operate at the following conditions. Design Speed: 21 m/s Design sectional lift: 11,000 N/m Density; 1000 kg/ m3 Vapor pressure: 2500 kPa Surface pressure: 101 kpa Depth to foil: 2 meters Vertical velocity inflow variation: +/- 0.5 m/s Find the chordlength, camber ratio, foil angle of attack and thickness ratio such the foil satifies the required performance without cavitation. 2) A section of a propeller is to be designed to achieve the desired performance while remaining cavitation free. The following data has been extracted from the lifting line design of the propeller: - r/R of section 0.7 - Propeller diameter: 4 m - Ship speed 10 m/s
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This note was uploaded on 02/27/2012 for the course MECHANICAL 2.23 taught by Professor Pauld.sclavounos during the Spring '07 term at MIT.

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Ps5 - 2.23 Hydrofoils Propellers Homework Assignment#5 Assigned Friday April 6 2007 Due Friday Apr 13 2007 1 A two-dimensional hydrofoil section is

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