Modeling fan stage acoustic characteristics

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.