کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
292950 511091 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measurement of sound source distribution around a circular cylinder in a uniform flow by combined particle image velocimetry and microphone technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Measurement of sound source distribution around a circular cylinder in a uniform flow by combined particle image velocimetry and microphone technique
چکیده انگلیسی


• An experimental method for measuring sound sources is presented.
• Fluctuating pressures are evaluated from PIV combined with pressure Poisson equation.
• Cross-correlation analysis is introduced into the sound source measurement.
• The sound sources around a circular cylinder agree with the observation in literature.

This study examined an experimental method for locating aerodynamic sound sources from a bluff body in a stream. The sound sources are evaluated from cross-correlation analysis of the pressure fluctuations on and around the flow field and the sound pressure fluctuations. Measurements are carried out in the sound field emitted from the circular cylinder at Reynolds number Re=4×104. The pressure fluctuations around the circular cylinder are evaluated by measuring the instantaneous velocity field using particle image velocimetry combined with the pressure Poisson equation, while the sound pressure fluctuations are measured simultaneously by a microphone in the far field. The experimental results showed that sound sources were found near the flow separation on both sides of the cylinder and in the near wake. The experimental results were validated by direct measurement of the pressure fluctuations on the cylinder surface using a pressure transducer. The sound sources obtained from the cross-correlation analysis agreed well with those of the direct measurement of pressure fluctuations on the cylinder surface and those around the cylinder in previous studies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 118, July 2013, Pages 1–11
نویسندگان
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