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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Печать: 1065-3090
ISSN Онлайн: 1940-4336

Выпуски:
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Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.2011003362
pages 137-164

FLOW VISUALIZATION OF LOW-MOMENTUM ELEVATED JETS IN CROSS-FLOWS

Andrew W. Cameron
Department of Mechanical Engineering, University of Ottawa, Ottawa, Ontario KIN 6N5, Canada
Stavros Tavoularis
Department of Mechanical Engineering, University of Ottawa, Ottawa, Ontario KIN 6N5, Canada
Matthew R. Johnson
Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, Ontario K1S 5B6, Canada

Краткое описание

An experimental study has been conducted in a water channel to examine the structure of laminar jets issuing orthogonally into a cross-flow from a pipe extending far away from the channel's free surface and wall boundary layers; interest has been focused on the range of jet momentum fluxes that are significantly lower than the cross-flow momentum flux. Three familiar types of coherent structures have been identified: von Kármán vortices, a pipe-end vortex, and shear-layer vortices; an additional pattern, previously observed in a cursory manner only and presently termed "tendrils," has been found to appear under certain conditions. All types of structures have been documented qualitatively and quantitatively. The various physical mechanisms for the generation and evolution of vorticity throughout the flow have also been discussed.