Geodesic
Modeling fan stage acoustic characteristics
Matematičeskoe modelirovanie, Tome 19 (2007) no. 8, pp. 97-104.

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It is described detail analysis of the different fan stage geometry from point of its aerodynamic and acoustic parameters. The analysis is based on gas dynamic three-dimensional calculations of rotor-stator interaction between the fan blades and the stator guide vanes of the both ducts of an advanced turbo-jet engine. The distributions of the unsteady pressure along the outlet guide vane mid-surfaces are regarded as distributed acoustic sources in the applied approach. The six different variants of fan stage geometry have been analyzed. As a result, the variants with optimal correlation between aerodynamical efficiency and acoustic characteristics have been determined. 
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A. M. Sipatov; N. O. Chuhlanntseva. Modeling fan stage acoustic characteristics. Matematičeskoe modelirovanie, Tome 19 (2007) no. 8, pp. 97-104. http://geodesic.mathdoc.fr/item/MM_2007_19_8_a11/

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