The results are given of flow visualization studies and inflow velocity field measurements performed on a 1/12 scale model of the XV-15 tilt rotor aircraft in the hover mode. The complex recirculating flow due to the rotor-wake-body interactions characteristic of tilt rotors was studied visually using neutrally buoyant soap bubbles and quantitatively using hot wire anemometry. Still and video photography were used to record the flow patterns. Analysis of the photos and video provided information on the physical dimensions of the recirculating fountain flow and on details of the flow including the relative unsteadiness and turbulence characteristics of the flow. Recirculating flows were also observed along the length of the fuselage. Hot wire anemometry results indicate that the wing under the rotor acts to obstruct the inflow causing a deficit in the inflow velocities over the inboard region of the model. Hot wire anemometry also shows that the turbulence intensities in the inflow are much higher in the recirculating fountain reingestion zone.
Flow visualization and flow field measurements of a 1/12 scale tilt rotor aircraft in hover
01.01.1991
Aufsatz (Konferenz)
Keine Angabe
Englisch
Full-scale tilt-rotor hover performance
NTRS | 1986
|Tilt rotor broadband hover aeroacoustics
Tema Archiv | 1993
|Hover tests of the XV-15 Tilt Rotor Research Aircraft
AIAA | 1981
|Full scale hover test of a 25 foot tilt rotor
NTRS | 1973
|