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Title: Effect of nonaxisymmetric forcing on a swirling jet with vortex breakdown

Abstract

The helical mode instability (which is related to the centrifugal instability) may be a key aspect of the enhanced mixing and entrainment mechanism in strongly swirling jets. The purpose of the present investigation is to excite the helical mode instability of the vortex breakdown flow field. It is expected that this excitation may affect the development of the flow field and enhance the mixing and entrainment. Nonaxisymmetric forcing was applied to the breakdown flow field of a strongly swirling jet. This led to excitation of the helical mode at any desired frequency. Effects of forcing on the flow field were investigated.

Authors:
 [1]
  1. Univ. of Cincinnati, OH (United States). Dept. of Mechanical, Industrial and Nuclear Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
267958
Resource Type:
Journal Article
Journal Name:
Journal of Fluids Engineering
Additional Journal Information:
Journal Volume: 118; Journal Issue: 2; Other Information: PBD: Jun 1996
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; CYCLONE COMBUSTORS; VORTEX FLOW; MIXING; ENERGY EFFICIENCY; FORCING FUNCTIONS

Citation Formats

Gursul, I. Effect of nonaxisymmetric forcing on a swirling jet with vortex breakdown. United States: N. p., 1996. Web. doi:10.1115/1.2817379.
Gursul, I. Effect of nonaxisymmetric forcing on a swirling jet with vortex breakdown. United States. doi:10.1115/1.2817379.
Gursul, I. Sat . "Effect of nonaxisymmetric forcing on a swirling jet with vortex breakdown". United States. doi:10.1115/1.2817379.
@article{osti_267958,
title = {Effect of nonaxisymmetric forcing on a swirling jet with vortex breakdown},
author = {Gursul, I},
abstractNote = {The helical mode instability (which is related to the centrifugal instability) may be a key aspect of the enhanced mixing and entrainment mechanism in strongly swirling jets. The purpose of the present investigation is to excite the helical mode instability of the vortex breakdown flow field. It is expected that this excitation may affect the development of the flow field and enhance the mixing and entrainment. Nonaxisymmetric forcing was applied to the breakdown flow field of a strongly swirling jet. This led to excitation of the helical mode at any desired frequency. Effects of forcing on the flow field were investigated.},
doi = {10.1115/1.2817379},
journal = {Journal of Fluids Engineering},
number = 2,
volume = 118,
place = {United States},
year = {1996},
month = {6}
}