EXAMINATION OF VORTEX DEFORMATION DURING BLADE-VORTEX INTERACTION

Results of a blade-vortex interaction (BVI) study incorporating partic le image velocimetry (PIV) are presented, Test cases encompass a varie ty of intersection geometries, including head-on parallel interactions , Results provide quantified flow visualization images of the flows ge nerated during interactions. The deformation and division of the inter action vortex during head-on interactions are documented, In addition, secondary vortical structures generated during interactions are obser ved and their effect upon the interaction vortex is examined. All PIV results are examined in the light of understanding gained from previou s pressure measurements made from the same BVI facility.