The Effects of Three-Dimensional Imposed Disturbances on Bluff Body Near Wake Flows.
Abstract
Research Goals: To achieve a better understanding of the underlying three-dimensional flow structure in the near wake of a nominally two- dimensional bluff body. To understand the effects of three-dimensional features that are characterised by vortex splitting and looping on wake parameters such as base pressure, vortex shedding frequency, wake width and vortex formation length. An underlying aim is to investigate why, for Reynolds numbers greater than a few hundred, some flow quantities predicted by two-dimensional numerical simulations of bluff body flows are not always in good agreement with experiment. Objectives: (1) To control the occurrence of three-dimensionality in the shed vortices by applying mild three-dimensional geometric disturbances along the span. (2) To study the effects of geometric disturbances on wake parameters such as: Strouhal number, base pressure and vortex formation length. (3) To visualize vortex dislocations and the various modes of shedding. (4) To understand the dynamics of vortex dislocations. (KAR) p. 2
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1993
- Accession Number
- ADA298845
Entities
People
- Albin A. Szewczyk
- Peter W. Bearman
Organizations
- Imperial College London