کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
652554 885026 2007 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hysteresis in flow patterns in annular swirling jets
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Hysteresis in flow patterns in annular swirling jets
چکیده انگلیسی

This study investigates the influence of swirl on the mean cold flowfield of an annular jet with a stepped-conical expansion. Both the axial and azimuthal velocity components are measured using a two component Laser Doppler Anemometry system in forward scattering mode. A detailed description of the radial profiles of both mean axial and azimuthal velocity as well as three components of the Reynolds stress are given. Four different jets are identified as a function of the swirl number: ‘Closed Jet Flow’, ‘Open Jet Flow Low Swirl’, ‘Open Jet Flow High Swirl’ and ‘Coanda Jet Flow’. These flow patterns change with varying swirl number and there exists hysteresis when increasing and subsequently decreasing the swirl. Also a method for jet identification based upon pressure measurements is presented to replace the time consuming LDA measurements.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 31, Issue 6, May 2007, Pages 513–524
نویسندگان
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