A CFD/experimental comparative database to feed a predictive model for ground vortex characteristics

Abstract Most modern aircraft engines rely on the use of high Bypass Ratios (BPR) turbofans to achieve both thrust and low specific fuel consumption. However, such configurations are prone formation ground vortices during low-speed operations. This phenomenon arises under combinations wind direction, velocity or inlet air speed, generating engine vibrations leading suction damaging abrasive particles. Its characterization in early design stages is crucial. In this work, a joint experimental numerical exploration operating conditions vortex presence carried out scaled tunnel configuration. Flow details investigated for several working points obtained from set input parameters (intake clearance). A methodology suitable Computational Fluid Dynamics (CFD) works developed extract characteristic quantities, based local pressure minimum Q-criterion contours topology. very good agreement when comparing predictions stemming CFD experiments. database shall be used transpose data probed outside nacelle within using analytics techniques, paving way future driven predictive models.