Accession Number:

ADA010481

Title:

Incompressible, Inviscid, Symmetrical Flow about Ellipsoids - Comparison of an Approximate Theory with Exact Results.

Descriptive Note:

Scientific rept.,

Corporate Author:

TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF AERONAUTICAL ENGINEERING

Personal Author(s):

• Costi,S.
• Portnoy,H.

Report Date:

1974-12-01

Pagination or Media Count:

54.0

Abstract:

In an earlier report, a first-order theory for thin lifting wings was developed which is uniformly valid near the rounded wing-leading-edges and tips and is also uniformly valid near the effectively rounded edges of the wing wake assuming an effective displacement boundary to the wake. In this report the method is applied to find the flow on the surface of a thin ellipsoid, without wake, at zero angle of attack and yaw, and the results are compared with those obtained from the classical exact potential theory for ellipsoids. Good agreement is found on the whole, and a few questionable results are shown to be due to the use of a numerical differentiation procedure. It is recommended that the calculation be modified so as to remove the necessity for numerical differentiation.

Descriptors:

• *ELLIPSOIDS
• *FLOW FIELDS
• *INCOMPRESSIBLE FLOW
• *THIN WINGS
• MATHEMATICAL MODELS
• ISRAEL
• METHODOLOGY
• EXPERIMENTAL DATA
• TABLES(DATA)
• NUMERICAL METHODS AND PROCEDURES
• INVISCID FLOW
• POTENTIAL THEORY

Subject Categories:

• Aerodynamics
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE