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Unformatted text preview: Figure 1 shows a propeller craft, and Figure 2 shows a sketch of a jet engine with an unducted fan. Figure 3 shows propulsive efficiency as a function of airspeed for different engine bypass ratios. Figure 1: A propeller gives a relatively small impulse ( ) to a relatively large mass flow (Boeing, 2000) Figure 1 2 : An advanced, contour-rotating, unducted fan concept (Rolls-Royce, 1992) Figure 3 : Propulsive efficiency comparison for various gas turbine engine configurations (Rolls-Royce, 1992)...
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This note was uploaded on 04/11/2008 for the course AEM 4203 taught by Professor Schwartzentruber during the Spring '08 term at Minnesota.
- Spring '08