Comparison of Measured and Calculated Helicopter Rotor Impulsive Noise. [wind Tunnel Test Data and Prediction Analysis Techniques]
| Author | : National Aeronautics and Space Administration (NASA) |
| Publisher | : Createspace Independent Publishing Platform |
| Total Pages | : 30 |
| Release | : 2018-07-26 |
| ISBN-10 | : 172426043X |
| ISBN-13 | : 9781724260437 |
| Rating | : 4/5 (437 Downloads) |
Download or read book Comparison of Measured and Calculated Helicopter Rotor Impulsive Noise. [wind Tunnel Test Data and Prediction Analysis Techniques] written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-26 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thickness noise theory is discussed. Two full-scale rotors were tested in a wind tunnel with several tips involving changes in chord, thickness, and sweep. Impulsive noise data reduction procedures used are described. The calculated and measured impulsive noise peak pressures as a function of advancing tip Mach number are compared, showing good correlation for all rotors considered. Johnson, W. and Lee, A. Ames Research Center NASA-TM-78473, A-7355 NAS2-9399; RTOP 505-10-21
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