کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
738121 893987 2011 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectral analysis of a synthetic jet
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Spectral analysis of a synthetic jet
چکیده انگلیسی

In their earlier publications, the present authors discovered a phenomenon, previously not reported, of sudden substantial change in the character and structure of axisymmetric synthetic jets that occurs at the relative axial distance X1*/d∼50. The hypothesis suggested for explanation was the change being associated with the transition from the regime dominated by coherent vortical structures into the flow dominated by stochastic turbulence. To validate the hypothesis, this paper presents frequency spectra at various locations in a synthetic jet generated at the forcing frequency ff = 30 Hz from a d = 4 mm nozzle. The results, a change in the character of the spectra, obviously do corroborate the idea. In addition, the performed analysis of the velocity spectra has lead to several previously not known facts about synthetic jets.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 167, Issue 2, June 2011, Pages 213–225
نویسندگان
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