کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5012049 | 1462671 | 2016 | 44 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of flow vectoring phenomenon in adjacent synthetic jets using CFD and PIV
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مکانیک محاسباتی
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چکیده انگلیسی
Flow vectoring by a pair of synthetic jets is suitable for modification of the global flow characteristics with practical applications in active flow control and adaptive heat convection. The interaction of a pair of synthetic jets, with a separation distance s = 3.3D, stroke length L0 = 29D, and Reynolds number Re = 300, are investigated numerically using computational fluid dynamics (CFD) and experimentally using particle image velocimetry (PIV). To achieve the most realistic calculation of the flow induced by synthetic jets, a full unsteady RANS simulation is performed of the internal flow in two cavities as well as the external jet flow using a dynamic mesh technique. The results for the intricate flow vectoring phenomenon show a reasonable quantitative agreement with PIV measurements, with a maximum deviation from PIV measurements of 14% for stream-wise centreline velocity in 10 < y/D < 20. The effect of phase difference between the pair of jets on the vectoring of the merged jet is investigated for δâ
=0â,60âand130â. The merged jet is vectored in the direction of the cavity that is leading in phase, with a similar trend shown by the experimental and numerical results of instantaneous and time-averaged vortical structures. This leads to a better physical understanding of the fluid mechanics of adjacent synthetic jets, and will enhance the theoretical basis needed to promote their practical application.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 140, 25 November 2016, Pages 232-246
Journal: Computers & Fluids - Volume 140, 25 November 2016, Pages 232-246
نویسندگان
Sajad Alimohammadi, Eoin Fanning, Tim Persoons, Darina B. Murray,