THEORETICAL STUDIES OF TIP CLEARANCE AND RADIAL VARIATION OF BLADE LOADING ON THE OPERATION OF DUCTED FANS AND PROPELLERS

Actuator disc theory and surface singularity techniques are applied to the performance of ducted fans and propellers, with particular reference to the radial clearance between rotor tips and duct inner surface and the radial distribution of rotor-blade loading. Many accounts have been written on ducted propellers but none includes the effects of clearance in any other than an approximate manner, that is, one-dimensional theory. The few studies that have been made of the radial variation in blade loading have been inconclusive and vague, mainly because of the inadequate duct model employed. Here an accurate nonlinear theory is used to represent the duct and centerbody which has already been used successfully in the prediction of ducted propeller performance.

  • Corporate Authors:

    Institution of Mechanical Engineers

    1 Birdcage Walk
    London SW1H 9JJ,   England 
  • Authors:
    • Gibson, I S
  • Publication Date: 1974-12

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00098260
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Aug 13 1975 12:00AM