Propeller tip vortex interactionsPropeller wakes interacting with aircraft aerodynamic surfaces are a source of noise and vibration. For this reason, flow visualization work on the motion of the helical tip vortex over a wing and through the second stage of a counterrotation propeller (CRP) has been pursued. Initially, work was done on the motion of a propeller helix as it passes over the center of a 9.0 aspect ratio wing. The propeller tip vortex experiences significant spanwise displacements when passing across a lifting wing. A stationary propeller blade or stator was installed behind the rotating propeller to model the blade vortex interaction in a CRP. The resulting vortex interaction was found to depend on the relative vortex strengths and vortex sign.
Document ID
19900032791
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Johnston, Robert T. (Purdue Univ. West Lafayette, IN, United States)
Sullivan, John P. (Purdue University West Lafayette, IN, United States)