Department of Aerospace Engineering, University of Glasgow
Abstract
This report contains a brief review of the unsteady aerodynamic and aeroelastic
phenomena of relevance to the operation of the Inco fan installation. The review
addresses issues associated with unsteady inlet flow phenomena due to an upstream
vortical wake and the aeroelastic flutter characteristics of the rotor assembly.
Based on the available information on inlet flow and blade structural dynamic
characteristics a number of conclusions are made. Firstly the vortical wake will be
three dimensional in nature, although the von Karman vortices generated from the
motor housing will predominate. These have the potential to induce vibration in the
fan blading, and should be investigated further. Secondly, it is recommended that the
potential for stall flutter and single mode bending-torsion flutter be further
investigated