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Effects of an axial flow component on the Honji instability

Citation

Yang, K and Cheng, L and An, H and Bassom, AP and Zhao, M, Effects of an axial flow component on the Honji instability, Journal of Fluids and Structures, 49 pp. 614-639. ISSN 0889-9746 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier Ltd.

DOI: doi:10.1016/j.jfluidstructs.2014.06.003

Abstract

This paper is concerned with a numerical study of the three-dimensional Honji instability that can arise in an oscillatory flow impinging on a circular cylinder. It is well known that when the fluid motion far from the cylinder is perpendicular to its axis then the flow is liable to a three-dimensional breakdown via this instability which initially appears as an axially periodic mushroom-like structure attached to the surface of the cylinder. Here the focus is on examining the Honji instability under an oblique inflow. The obliqueness of the free stream is represented by an angle of attack through introducing an axial flow component. It is found that the Honji mode is suppressed by increasing the axial flow component, and when this component is sufficiently large the instability mechanism is no longer operative so that all that remains is a featureless two-dimensional columnar flow. At smaller values of angle of attack, though the Honji structure remains, it is deformed by the axial flow component. The developed two-layer near-cylinder vortical structures can be related to the energy and momentum transfer between the two layers.

Item Details

Item Type:Refereed Article
Keywords:oscillatory flow, Honji instability, numerical methods, angle of attack
Research Division:Mathematical Sciences
Research Group:Applied Mathematics
Research Field:Theoretical and Applied Mechanics
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Mathematical Sciences
Author:Bassom, AP (Professor Andrew Bassom)
ID Code:105804
Year Published:2014
Web of Science® Times Cited:3
Deposited By:Mathematics and Physics
Deposited On:2016-01-14
Last Modified:2017-11-01
Downloads:0

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