Low speed aerodynamic characteristics of a very simple dacron airfoil were investigated in a low speed, low turbulence wind tunnel. The influence of the slack of the sail on the lift coefficient cl, drag coefficient cd, and cl/cd, was studied. Measurements were performed at chord Reynolds numbers 200,000, 300,000, and 500,000 at values of the angle of attack and slack of the sail where relatively high values of the ratio cl/cd occurred. Results show that the value (cl/cd)max of the airfoil exceeds the value (cl/cd)max of a similar configuration in which a rigid circular plate of 10% camber is used instead of a sail.
Low Speed Aerodynamic Characteristics of a Two-Dimensional Sail Wing with Adjustable Slack of the Sail
1984
38 pages
Report
No indication
English
Research on the Aerodynamic Characteristics of Ellipse Wing Sail
Trans Tech Publications | 2011
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