ディスク・ローディング
出典: フリー百科事典『ウィキペディア（Wikipedia）』 (2022/09/19 04:35 UTC 版)
流体力学におけるディスク・ローディング（回転面荷重）とは、回転推進翼などのアクチュエーター・ディスク（推進円盤）の前後の圧力変化量の平均値である。ヘリコプターのメインローターおよびテールローターなどの比較的ディスク・ローディングが小さい回転推進翼はローターと呼ばれ、ディスク・ローディングが大きい回転推進翼はプロペラと呼ばれる[1] 。V-22オスプレイ・ティルトローター機のディスク・ローディングは、ホバリング・モード時にはヘリコプターよりも大きいが、エアプレーン・モード時にはターボプロップ機よりも小さい[2]。
- ^ Keys, C. N.; Stepniewski, W. Z. (1984). Rotary-wing aerodynamics. New York: Dover Publications. pp. 3. ISBN 0-486-64647-5. "It is interesting to note that there has always been a strong intuitive association of rotary-wing aircraft with low disc loading which is reflected in the commonly accepted name of rotor given to their lifting airscrews."
- ^ Wang, James M.; Jones, Christopher T.; Nixon, Mark W. (1999-05-27). “A Variable Diameter Short Haul Civil Tiltrotor”. 55th Annual Forum of the American Helicopter Society. Montreal, Canada. "The variable diameter tiltrotor (VDTR) is a Sikorsky concept aimed at improving tiltrotor hover and cruise performance currently limited by disk loading that is much higher in hover than conventional helicopter, and much lower in cruise than turbo-prop systems."
- ^ Rotorcraft Flying Handbook. U.S. Government Printing Office, Washington D.C.: U.S. Federal Aviation Administration. (2000). pp. 2–4, 19-3, G-2. FAA-8083-21. "DISC LOADING—The total helicopter weight divided by the rotor disc area."
- ^ Maisel, Martin D., Demo J. Giulianetti and Daniel C. Dugan. NASA SP-2000-4517, "The History of the XV-15 Tilt Rotor Research Aircraft: From Concept to Flight" (PDF) p2. NASA, 2000. Accessed: 17 March 2012.
- ^ Noor, Ahmed Khairy (1996). Future Aeronautical and Space Systems (Progress in Astronautics and Aeronautics). AIAA (American Institute of Aeronautics & Astronautics). pp. 66. ISBN 1-56347-188-4. "Reduced disk loading in the vertical mode also results in lower downwash and improved capability for autorotation."
- ^ Leishman, J. Gordon. "Development of the Autogiro : A Technical Perspective Archived 2005-12-31 at the Wayback Machine." page 5. Hofstra University, New York, 2003.
- ^ Birdsall, David (1996). Aircraft Performance. Cambridge: Cambridge University Press. pp. 99. ISBN 0-521-56836-6. "contra-rotating propellers this rotational loss can be eliminated and maximum efficiencies approaching 0.9 can be obtained even with high disc loading"
- ^ Reinhard Hilbig; Wagner, Siegfried; Ulrich Rist; Hans-Joachim Heinemann (2002). New Results in Numerical and Experimental Fluid Mechanics III. Notes on Numerical Fluid Mechanics and Multidisciplinary Design. 3. Berlin: Springer. p. 82. ISBN 3-540-42696-5. "The A400M will be driven by four modern turboprop engines with a high disc loading.... The disc loading of the propellers is significantly higher than realised on former tactical transport aircraft like C130H or Transall C160."
- ^ Johnson, Wayne (1994). “2”. Helicopter theory. New York: Dover Publications. pp. 28–34. ISBN 0-486-68230-7. "In the momentum theory analysis the rotor is modeled as an actuator disk, which is a circular surface of zero thickness that can support a pressure difference and thus accelerate the air through the disk."
- ^ Principles of Helicopter Aerodynamics (Cambridge Aerospace Series). Cambridge, UK: Cambridge University Press. (2006). ISBN 0-521-85860-7
[続きの解説]
「ディスク・ローディング」の続きの解説一覧
- 1 ディスク・ローディングとは
- 2 ディスク・ローディングの概要
- 3 実例
- 4 関連項目
- ディスク・ローディングのページへのリンク
