Accession Number:

AD0735018

Title:

Application of the Ring Vortex Method to Aerodynamic Design of Lifting Rotor Systems

Descriptive Note:

Corporate Author:

ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA

Personal Author(s):

• Shaidakov, V. I.

Report Date:

1971-11-10

Pagination or Media Count:

16.0

Abstract:

The operation of the lifting rotor during flight with a horizontal velocity component has been the subject of considerable study. The ring vortex method is a simplified procedure for accurately determining the aerodynamic characteristics of the lifting rotor. The replacement of the vortex cylinder with a system of discrete vortex rings is equivalent to expansion of the vortex cylinder into rings and longitudinal vortices. Ignoring the longitudinal vortices is equivalent to ignoring the closure of the stream behind the rotor. For low loaded lifting rotors, no significant error is thus created.

Descriptors:

• *HELICOPTER ROTORS
• AERODYNAMIC CHARACTERISTICS
• LIFT
• MATHEMATICAL MODELS
• ROTOR BLADES(ROTARY WINGS)
• THEORY
• USSR
• VORTICES

Subject Categories:

• Aerodynamics
• Helicopters
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE