PATTERN RECOGNITION ANALYSIS OF ORGANISED EDDY STRUCTURES IN A NUMERICALLY SIMULATED TURBULENT PLANE JET
Abstract
By applying pattern recognition analysis, the organised eddy
structures in the near and intermediate fields (10-40 jet
diameters) of a numerically simulated turbulent plane jet
have been investigated. The Reynolds number based on the jet
width is 1, 600. The results of the nearly full simulation
show good agreement with the experimental measurements in
the near and intermediate regions (<40 diameters) of the
jet. Patterns of organised eddy structures have been
extracted from the three-dimensional simulation databases.
Ensemble averaged fields of three velocity components and
pressure in the spanwise and transverse planes suggest the
existence of inclined vortex pairs. These highly
three-dimensional vortical structures are confined to one
side of the jet centreplane and approximately align with the
principal axis of rate-of-strain. Some of the topological
features of these averaged eddy structures have been
examined.
Authors
Lo, Sing HonCollections
- Theses [4124]