[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5139/IJASS.2005.6.1.089

Conceptual Design of a Ducted Fan for Helicopter Anti-Torque System

Hwang, Chang-Jeon (Rotorcraft Development Division, Korea Aerospace Research Institute(KARI))

Publication Information

International Journal of Aeronautical and Space Sciences / v.6, no.1, 2005 , pp. 89-96 More about this Journal

Abstract

Ducted fans have advantages in noise as well as operational safety aspects compared to conventional tail rotors and are used as an anti-torque system for various classes of helicopters. The final goal of this study is to develop a ducted fan anti-torque system which can replace conventional tail rotors of existing helicopters to achieve safety enhancement and low noise level. In this paper, a conceptual design process and the results are described. Initially, the design requirement and the design parameter characteristics are analysed, and then initial sizing and configuration design are performed. There are several configuration changes due to specific technical reasons in each case. Finally, the required power and the pitch link load are predicted as an initial estimation. The conceptual design technique for the ducted fan in this study can be easily applied to the design of other ducted fans such as the lift fan for unmanned aerial vehicle.

Keywords

Tail Fan; Conceptual Design; Anti-Torque System; Helicopter;

Citations & Related Records

Reference

1	Vialle, M. & Arnaud, G., 1993, 'A New Generation of Fenestron Fan-in-Fin Tail Rotor on EC135', The 19th European Rotorcraft Forum Proceedings
2	Mouille, R., 1970, 'The 'Fenestron' Shrouded Tail Rotor of the SA.341 Gazelle', J. of AHS, Vol. 15, No.4
3	Vuillet, A. & Morelli, F., 1987, 'New Aerodynamic Design of the Fenestron for Improved Performance', AGARD-CP-423
4	Allongue, M. et al., 1999, 'The Quiet Helicopter-From Research To Reality', The 55th AHS Annual Forum Proceedings
5	Bourtsev, B.N. & Selemenev, S.V., 2000, 'Fan-in-Fin Performance at Hover Computational Method', The 26th European Rotorcrait Forum Proceedings
6	Rajagopalan, R.G. & Keys, C.N., 1997, 'Detailed Aerodynamic Ana;ysis of the RAH-66 FANTAIL Using CFD', J. of AHS
7	FAR Pt.29, 2000, 'Airworthiness Standards: Transport Category Rotorcraft'.
8	MIL-F-83300, 1970, 'Flying Qualities of Piloted V/STOL Aircraft'.
9	ADS 33E PRF, 1996, 'Performance Specification : Handling Qualities Requirements for Military Rotorcraft'
10	Lee, H.D. and Kwon, O., 2002, 'Data Provision for the 1st Ducted Fan Airload', ATS-KAIST-01-006 (In Korean)
11	Ahn, J. et al., 2003, 'Performance Prediction and Design Study of a Ducted Fan System', KSAS Spring Conference (In Korean)
12	Noonan, K.W. et al., 1977, 'Two Dimensional Aerodynamic Characteristics of Several Rotorcraft Airfoils at Mach Numbers from 0.35 to 0.9', NASA TM X 73990
13	Prouty, R.W., 1986, 'Helicopter Performance, Stability and Control', PWS Publishers
14	Bandoh, S. et al., 1998, 'The Ducted Tail Rotor System of the New Observation Helicopter(XOH-1)', Heli Japan 98
15	Andrew, J.R III et al., 1996, 'Design and Testing of a Ducted Tail Rotor Concept Demonstrator for a Model 222U Helicopter', The 22nd European Rotorcraft Forum Proceedings
16	Joo, G. et al., 2002, 'Technology Development of Helicopter Anti-Torque System(l)', Annual Report (In Korean)
17	Lynn, R.R. et al., 1970, 'Tail Rotor Design Part I : Aerodynamics', J. of AHS