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Analysis and comparison with theory of flow-field measurements near a lifting rotor in the Langley full-scale tunnel / by Harry H. Heyson.
- Format:
- Book
- Government document
- Author/Creator:
- Heyson, Harry H., author.
- Series:
- Technical note (United States. National Advisory Committee for Aeronautics) ; 3691.
- Technical notes / National Advisory Committee for Aeronautics ; No. 3691
- Language:
- English
- Subjects (All):
- Langley Aeronautical Laboratory.
- Air flow.
- Rotors (Helicopters).
- Wakes (Aerodynamics)--Measurement.
- Wakes (Aerodynamics).
- Wind tunnel testing.
- Physical Description:
- 1 online resource (162 pages) : illustrations.
- Place of Publication:
- Washington, [D.C.] : National Advisory Committee for Aeronautics, 1956.
- Summary:
- Results of an investigation in the Langley full-scale tunnel of the induced flow near a lifting rotor are given. Measurements of stream angles and velocities were made in several transverse planes along and behind the rotor in four different conditions representative of the cruising and high-speed ranges of flight. These measurements indicate that available theory may be used to calculate with reasonable accuracy the induced flow over the forward three-quarters of the disk for these flight conditions provided that a realistic nonuniform rotor disk-load distribution is assumed. Rearward of the three-quarter-diameter point, calculations of the induced velocity are increasingly inaccurate due to the rolling up of the trailing-vortex system. Farther rearward, well behind the rotor, the flow may be represented more accurately by the flow behind a uniformly loaded wing.
- Notes:
- Title from title screen (viewed June 7, 2019).
- "April 1956.
- "Langley Aeronautical Laboratory, Langley Field, Va."
- No Federal Depository Library Program (FDLP) item number.
- Includes bibliographical references (pages 15-16).
- Electronic reproduction. Denton, Texas : University of North Texas, 2011. Electronic reproduction from print master produced by University of North Texas.
- Other Format:
- Print version: Heyson, Harry H., Analysis and comparison with theory of flow-field measurements near a lifting rotor in the Langley full-scale tunnel /
- OCLC:
- 1104148319
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