Manoeuvring characteristics of slender bodies through fluid

Fishwick, NJ

Abstract

This research addresses the difficulties in determining the manoeuvring characteristics
of a slender body through a fluid. This work has direct applicability in many areas
of hydrodynamics and aerodynamics. For example the manoeuvring of ships and
submarines through water or the manoeuvring of missiles or aircraft through the
atmosphere for cases where the compressibility of the air is not a significant factor.
The research is approached by looking at both a slender body theory in potential
flow (inviscid) and a slender body theory in Oseen flow (viscous). The differences
between these two approaches are considered and the force expressions are found for
both cases. This work gives rise to a discrepancy between the lift force expressions
(sometimes referred to as the normal or side force) for the two approaches which leads
to some interesting comparisons and conclusions. This discrepancy in the lift force
calculation has in fact been noticed separately by both aerodynamicists, Alien [3],
and hydrodynamicists, Clarke [12] and Newman [27].
The work presented here looks at the reasons for this force discrepancy and links
slender wing theory and slender body theory together.

Citation

Fishwick, N. Manoeuvring characteristics of slender bodies through fluid. (Thesis). Salford : University of Salford

• Thesis Type: Thesis
• Deposit Date: Oct 3, 2012
• Award Date: Jan 1, 2004