The Effects of Uncertainties on Predicting Rotor and Propeller Performance.
Abstract
A comparison is made of classical vortex theory with experimental and numerical results on statically thrusting propellers and rotors, and on propellers in forward flight. It is concluded that vortex theory can accurately predict the overall thrust and power of these propulsors when proper account is taken of normality between the vortex sheet and induced velocities in the wake. Further, it is necessary to include accurate airfoil section lift and drag coefficients as a function of Mach number and angle-of-attack in order to realize an accurate prediction. Also, although corrections to account for section thickness and wide-blade effects were found to be negligible, the prediction of rotor or propeller performance was found to depend rather strongly on the helix angle at the edge of the trailing-vortex sheet.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1975
- Accession Number
- ADA008419
Entities
People
- David V. Pauling
Organizations
- Pennsylvania State University