Accession Number:

AD0780235

Title:

Calculation of the Viscous Resistance of Bodies of Revolution,

Descriptive Note:

Corporate Author:

IOWA INST OF HYDRAULIC RESEARCH IOWA CITY

Personal Author(s):

• Nakayama,A.
• Patel,V. C.

Report Date:

1973-10-01

Pagination or Media Count:

37.0

Abstract:

The flow in the tail region of a body of revolution is a complex one since there the boundary layer often grows to a thickness many times the local radius of the body and there results a strong interaction between the boundary layer and the external potential flow. The influence of making simplifying assumptions concerning the flow in this region in conventional drag-calculation methods is discussed, and assessed by incorporating a method which takes into account the effects of the thick axisymmetric boundary-layer near the tail in an approximate manner. It is shown that this modification leads to a drag-calculation method which gives consistently accurate prediction of the viscous resistance of a wide variety of bodies of revolution. Author

Descriptors:

• *Bodies of revolution
• *Drag
• Viscous flow
• Laminar boundary layer
• Boundary layer transition
• Turbulent boundary layer
• Coefficients

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE