Distribution of Acoustic Power Spectra for an Isolated Helicopter Fuselage
1 Kazan National Research Technical University n.a. A. N. Tupolev (KNRTU-KAI), Kazan, Russia
2 University of Liverpool, Liverpool, UK
1 Prof., department of aero-hydrodynamics, firstname.lastname@example.org
2 Prof., department of aero-hydrodynamics, email@example.com
3 PhD student, firstname.lastname@example.org
4 PhD student, email@example.com
5 Prof., department of Engineering, George.Barakos@glasgow.ac.uk
Published online: 28 March 2016
The broadband aerodynamic noise can be studied, assuming isotropic flow, turbulence and decay. Proudman’s approach allows practical calculations of noise based on CFD solutions of RANS or URANS equations at the stage of post processing and analysis of the solution. Another aspect is the broadband acoustic spectrum and the distribution of acoustic power over a range of frequencies. The acoustic energy spectrum distribution in isotropic turbulence is non monotonic and has a maximum at a certain value of Strouhal number. In the present work the value of acoustic power peak frequency is determined using a prescribed form of acoustic energy spectrum distribution presented in papers by S. Sarkar and M. Y. Hussaini and by G. M. Lilley. CFD modelling of the flow around isolated helicopter fuselage model was considered using the HMB CFD code and the RANS equations.
© Owned by the authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.