Analysis and Test Evaluation of the Dynamic Response and Stability of Three Advanced Turboprop Models at Low Forward Speed

Analysis and Test Evaluation of the Dynamic Response and Stability of Three Advanced Turboprop Models at Low Forward Speed

Unknown - 1985
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"Results of wind tunnel tests at low forward speed for blade dynamic response and stability of three 62.2 cm (24.5 in) diameter models of the Prop-Fan, advanced turboprop, are presented. Measurements of dynamic response were made with the rotors mounted on an isolated nacelle, with varying tilt for nonuniform inflow. Low speed stall flutter tests were conducted at Mach numbers from 0.0 to 0.35. Measurements are compared to Eigen-solution flutter boundaries. Calculated 1P stress response agrees favorably with experiment. Predicted stall flutter boundaries correlate well with measured high stress regions. Stall flutter is significantly reduced by increased blade sweep. Susceptibility to stall flutter decreases rapidly with forward speed."--NTIS abstract.
Publisher: Windsor Locks, Conn. : United Technologies Corporation, Hamilton Standard Division ; Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center ; [Springfield, Va. : For sale by the National Technical Information Service], 1985.
Characteristics: x, 101/102 p. : ill.

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