The Effects on Rotor Nonuniform Inflow Harmonic Content of Uneven Circumferential Distribution of Jet Engine Inlet Guide Vanes.
WOODROW WILSON INTERNATIONAL CENTER FOR SCHOLARS WASHINGTON DC ASIA PROGRAM
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A computative parametric study was conducted to investigate the effects of vane section geometry, vane number, and primarily, uneven circumferential vane spacing on the harmonic content of the wake field produced by a row of jet engine inlet guide vanes IGV. As parameters were varied, the harmonic content of the resulting wake field was analyzed for its potential effect on unsteady pressures at the rotor. A semi-empirical model is presented which was used to generate the two-dimensional flow field downstream of the IGV plane. Results show that uneven angular spacing of IGV should not be employed for reducing unsteady pressures experienced by the rotor. In fact, manufacturing tolerances, relative to IGV angular location, of evenly spaced vanes should be minimized to minimize unsteady pressures. Keywords Harmonic content Wake fields Inlet guide vanes.
- Fluid Mechanics
- Jet and Gas Turbine Engines