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Structural Design of High-Speed Propellers
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Language:
English
Abstract
VARIOUS structural problems encountered in the design of high-speed turboprop propellers are discussed in this paper.
Formulas for a number of design factors are also given here. These include:
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1.
Blade efficiency.
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2.
Power capacity.
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3.
Advance/diameter ratio.
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4.
Limiting tip speed.
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5.
Periodic lift.
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6.
Propeller normal force and moment.
The paper also describes two types of vibration occurring with turboprop installations:
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1.
First-ordered aerodynamically excited vibration.
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2.
Subsonic stall flutter.
The author shows how these vibrations may be accurately predicted and controlled by proper design of the propeller blades.