Accession Number:

AD0255529

Title:

METHOD FOR CALCULATING INDUCED VELOCITIES AT THE BLADES OF A SLIGHTLY INCLINED PROPELLER WITH CONSTANT CIRCULATION

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s):

• HEYSON,HARRY H.

Report Date:

1961-05-01

Pagination or Media Count:

1.0

Abstract:

A method for calculating the induced velocities at the blades of an inclined propeller is presented. The calculations are based upon an assumed wake consisting of one skewed helical vortex per blade. The blade circulation is assumed constant with respect to both radial and azimuth positions. The restriction of uniform radial circulation can be removed by superposition however, the assumption of constant azimuth-wise circulation restricts the analysis to small propeller inclinations. Numerical values have been obtained for one wake skew angle. These values indicate large effects due to wake vortex spacing and to the number of blades. Author

Descriptors:

• *GAS FLOW
• *PROPELLER BLADES
• *AERIAL PROPELLERS
• *VELOCITY
• AXISYMMETRIC FLOW
• DETERMINATION
• NUMERICAL INTEGRATION
• MATHEMATICAL ANALYSIS
• VORTICES
• WAKE

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE