Browse > Article
http://dx.doi.org/10.5407/JKSV.2010.8.2.023

Computational Flow Analysis around Coaxial Rotor Blades with Various Ducts  

Kim, Su-Yean (순천대학교 대학원 우주항공공학과)
Choi, Jong-Wook (순천대학교 기계우주항공공학부)
Kim, Sung-Cho (순천대학교 기계우주항공공학부)
Publication Information
Journal of the Korean Society of Visualization / v.8, no.2, 2010 , pp. 23-30 More about this Journal
Abstract
Regarding the aircrafts with a rotor blade system, the miniaturization of them is limited due to the rotor blade length and the tail rotor system. To miniaturize an aircraft, an equipment is required that increases thrust and also shortens the length of the rotor blade. The present study will conduct the flow analysis for miniaturizing the aircraft by applying a duct to the coaxial rotor blade system without tail rotor. First, the verification on the calculated results was conducted through the computational flow analysis on the coaxial rotor blade system without a duct. Then, the flow analysis for the coaxial rotor blade systems was performed including Ka-60 duct, Single duct, Twin duct, and Double duct, respectively. From the numerical results, the thrust coefficient appeared higher with the duct than without a duct for the coaxial rotor blade system. Especially, in the case of Double duct, the thrust was improved due to the increase of incoming flow and the extension of the wake area. These results will be used as the basic concepts for miniaturizing the aircraft with the rotor blade system. The flow analysis on the coaxial rotor blade system including the fuselage remains as a future work.
Keywords
Coaxial Rotor Blades; Duct System; Computational Flow Analysis; Thrust Coefficient; Wake Area;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Black, D. M., Wainauski, H. S. and Rohrbach, C., 1968, "Shrouded propellers- a comprehensive performance study," American Institute of Aeronautics and Astronautics of Annual Meeting and Technical Display, Vol.5, pp.21-24.
2 Yee, K. J., 1998, "Numerical analysis on the flow field around the counter-rotating helicopter rotors," Doctoral thesis, Seoul National University.
3 Lee, H. D., Kwon, O. J., Kang, H. J. and Joo, J., 2003, "Detail flow analysis of a helicopter shrouded tail rotor in hover using an unstructured mesh flow solver," The Korean Society for Aeronautical and Space Science, Vol.31(5), pp.1-9.   DOI
4 Ansys CFX, 2007, ANSYS ICEM CFD Ver. 11.0 User manual, Ansys inc.
5 Srinivasan, G. R., Baeder, J. D., Obayashi, S. and MeCroskey, W. J., 1992, "Flowfield of a Lifting Rotor in Hover : A Navier-Stokes simulation," American Institute for Aeronautics and Astronautics, Vol.30(10), pp.2371-2378.   DOI
6 ANSYS CFX, 2004, ANSYS CFX Ver. 11.0 User manual, Ansys inc.
7 Newman, S., 1994, Foundations of Helicopter Flight, Edward Arnold, Boston, USA.
8 Seddon, J., 1990, Basic Helicopter Aerodynamics, BSP Professional Book, Oxford, London.
9 Coleman, C. P., 1997, "A survey of theoretical and experimental coaxial rotor aerodynamic research," National Aeronautics and Space Administration, Technical Paper 3675.
10 Tomoari, N., Hiroshi, O. and Fujio, S., 1978, "Optimum performance and load sharing of co-axial rotor in hover," Japan Society for Aeronautics & Space Sciences, Vol.26(293), pp.325-333.   DOI
11 Tomoari, N. and Kenji, N., 1983, "Optimum performance and wake geometry of co-axial rotor in hover," Vertica, Vol.7(3), pp.225-239.
12 Vuillet, F. and Mouille, A., 1986, "New aerodynamic design of the fenestron for improved performance," Proc. European Rotorcraft Forum, Vol.12.
13 Xu, G. H. and Wang, S. C., 2001, "Effects of the shroud on aerodynamic performance in helicopter shrouded tail rotor system," Journal of Aircraft Engineering and Aerospace Technology, Vol.73(6), pp.568-572.   DOI   ScienceOn