Imperial College London
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Professor Aimee S. Morgans

Faculty of Engineering, Department of Mechanical Engineering

Professor of Thermofluids
 
 
 
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Contact

 

+44 (0)20 7594 9975a.morgans

 
 
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Location

 

621City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Guzmán-Iñigo:2018:10.2514/6.2018-2958,
author = {Guzmán-Iñigo, J and Morgans, AS and Durán, I},
doi = {10.2514/6.2018-2958},
title = {A model for the sound generated by entropy disturbances interacting with isolated blades},
url = {http://dx.doi.org/10.2514/6.2018-2958},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - This article presents a modelling approach to predict the low-frequency sound generated by entropy fluctuations interacting with isolated aerofoils. A model of the acoustic field is obtained based on a linearisation of the compressible Euler equations about a steady potential compressible mean flow. Neglecting the mean flow variations of velocity and density in the propagation of sound, but not in the source term, and using a Lorentz-type transformation, the problem is reduced to solving a Helmholtz equation. This equation is recast in integral form and a solution is obtained using a compact Green’s function method. This approach assumes that the acoustic wavelength is large compared to the profile chord and spacing, while no restrictions are made on the entropy wavelengths. The source term is further simplified by assuming that the steady flow is a small perturbation to an uniform flow. The model is illustrated using a symmetric aerofoil and its performance is assessed with numerical simulations of the compressible Euler equations.
AU  - Guzmán-Iñigo,J
AU  - Morgans,AS
AU  - Durán,I
DO  - 10.2514/6.2018-2958
PY  - 2018///
TI  - A model for the sound generated by entropy disturbances interacting with isolated blades
UR  - http://dx.doi.org/10.2514/6.2018-2958
ER  -
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