Aerodynamic and acoustic analysis of helicopter main rotor blade tips in hover

Garipova, L. I., Batrakov, A. S., Kusyumov, A. N., Mikhailov, S. A. and Barakos, G. (2016) Aerodynamic and acoustic analysis of helicopter main rotor blade tips in hover. International Journal of Numerical Methods for Heat and Fluid Flow, 26(7), pp. 2101-2118. (doi:10.1108/HFF-08-2015-0348)

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Abstract

Purpose: The design of main rotor blade tips is of interest to helicopter manufactures since the tip details affect the performance and acoustics of the rotor. The paper aims to discuss this issue. Design/methodology/approach: In this paper, computation fluid dynamics is used to simulate the flow around hovering helicopter blades with different tip designs. For each type of blade tip a parametric study on the shape is also conducted for comparison calculations were performed the constant rotor thrust condition. The collective pitch and the cone angles of the blades were determined by at an iterative trimming process. Findings: Analysis of the distributed blade loads shows that the tip geometry has a significant influence on aerodynamics and aeroacoustics especially for stations where blade loading is high. Originality/value: The aeroacoustic characteristics of the rotors were obtained using Ffowcs Williams-Hawkings equations.

Item Type:Articles
Additional Information:This work was supported by the “State tasks in the field of scientific activity” (No 9.1694.2014/REFERENCES K) Grant.
Keywords:CFD, Ffowcs Williams - Hawkings equation, helicopter, main rotor, blade design
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Barakos, Professor George
Authors: Garipova, L. I., Batrakov, A. S., Kusyumov, A. N., Mikhailov, S. A., and Barakos, G.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:International Journal of Numerical Methods for Heat and Fluid Flow
Publisher:Emerald
ISSN:0961-5539
ISSN (Online):1758-6585
Published Online:12 September 2016
Copyright Holders:Copyright © 2016 Emerald Group Publishing Limited
First Published:First published in International Journal of Numerical Methods for Heat and Fluid Flow 26(7):2101-2118
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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