BENDING-TORSION FLUTTER OF A HIGHLY SWEPT ADVANCED TURBOPROP.

Published

Journal Article

Experimental and analytical results are presented for a bending-torsion flutter phenomena encountered during wind-tunnel testing of a ten-bladed, advanced, high-speed propeller (turboprop) model with thin airfoil sections, high blade sweep, low aspect ratio, high solidity and transonic tip speeds. Flutter occured at free-stream Mach numbers of 0. 6 and greater and when the relative tip Mach number (based on vector sum of axial and tangential velocities) reached a value of about one. The experiment also included two- and five-blade configurations. The data indicate that aerodynamic cascade effects have a strong destabilizing influence on the flutter boundary. The data was correlated with analytical results which include aerodynamic cascade effects and good agreement was found.

Duke Authors

Cited Authors

  • Mehmed, O; Kaza, KRV; Lubomski, JF; Kielb, RE

Published Date

  • December 1, 1982

Published In

International Standard Serial Number (ISSN)

  • 0499-9320

Citation Source

  • Scopus