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Airfoil in sinusoidal motion in a pulsating stream / by J. Mayo Greenberg.
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View online- Format:
- Book
- Government document
- Author/Creator:
- Greenberg, J. Mayo (Jerome Mayo), 1922- author.
- Series:
- Technical note (United States. National Advisory Committee for Aeronautics) ; 1326.
- Technical notes / National Advisory Committee for Aeronautics ; No. 1326
- Language:
- English
- Subjects (All):
- Aerofoils.
- Harmonic motion.
- Rotational motion (Rigid dynamics).
- Rotors (Helicopters).
- Physical Description:
- 1 online resource (18 pages, 2 unnumbered pages) : illustrations.
- Place of Publication:
- Washington, [D.C.] : National Advisory Committee for Aeronautics, 1947.
- Summary:
- The forces and moments on a two-dimensional airfoil executing harmonic motions in a pulsating stream are derived on the basis of nonstationary incompressible potential-flow theory, with the inclusion of the effect of the continuous sheet of vortices shed from the trailing edge. An assumption as to the form of the wake is made with a certain degree of approximation. A comparison with previous work applicable only to the form of the wake is made with a certain degree of approximation. A comparison with previous work applicable only to the special case of a stationary airfoil is made by means of a numerical example and the excellent agreement obtained shows that the wake approximation is quite sufficient. The results obtained are expected to be useful in considerations of forced vibrations and flutter of rotary-wing aircraft for which the lifting surfaces are in air streams of variable velocity.
- Notes:
- Title from title screen (viewed June 7, 2019).
- "June 1947."
- "Langley Memorial Aeronautical Laboratory."
- No Federal Depository Library Program (FDLP) item number.
- Includes bibliographical references (page 18).
- Electronic reproduction. Denton, Texas : University of North Texas, 2011. Electronic reproduction from print master produced by University of North Texas.
- Other Format:
- Print version: Greenberg, J. Mayo Airfoil in sinusoidal motion in a pulsating stream /
- OCLC:
- 1104148301
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