Computational aerodynamics of hovering helicopter rotors

Nik Mohd, N. A. R. and Barakos, G. N. (2012) Computational aerodynamics of hovering helicopter rotors. Jurnal Mekanikal, 34, pp. 16-46.

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Publisher's URL: http://jurnalmekanikal.fkm.utm.my/UserFiles/file/issue%2034/new/Computational%20Aerodynamics%20of%20Hovering%20Helicopter%20Rotors.pdf

Abstract

The computation of rotor flowfields is a challenging problem in theoretical aerodynamics and essential for rotor design. In this paper we discuss the prediction of rotor hover performance, wake geometry and its strength using CFD methods. The benefits and differences between simple, momentum-based source-sink models and truncated vortextube far-field boundary conditions on the rotor flowfield modelling, and the convergence of the numerical solution are investigated and presented. Helicopter rotors in axial flight are simulated using the Helicopter Multi-block (HMB2) solver of the Liverpool University for a range of rotor tip speeds and collective pitch settings. The predicted data were then compared with available experimental data and the results indicates that, blade loading and wake geometry are in excellent agreement with experiments and have moderate sensitivity to the grid resolution. The work suggests that efficient solutions can be obtained and the use of the momentum theory is essential for efficient CFD computations.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Barakos, Professor George
Authors: Nik Mohd, N. A. R., and Barakos, G. N.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Jurnal Mekanikal
Publisher:Universiti Teknologi Malaysia
ISSN:2289-3873
ISSN (Online):2289-3866

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