Comparison of PIV and Hot-Wire statistics of turbulent boundary layer

21st Fluid Mechanics Conference

物理学;力学

Drózdz, A.^1 ; Uruba, V.^2

Czestochowa University of Technology, Armii Krajowej 21, Czestochowa, Poland^1

Academy of Science of the Czech Republic, Dolejskova 5, 182 00 Prague 8, Czech Republic^2

关键词: Hot wire anemometry;    Hot wire measurements;    Kurtosis coefficient;    Large field of views;    Statistical characteristics;    Stream-wise velocities;    Turbulent boundary layers;    Velocity fluctuations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/530/1/012044/pdf
DOI  :  10.1088/1742-6596/530/1/012044

学科分类：力学，机械学

来源: IOP

【 摘 要 】

The paper shows a cross checking of turbulent boundary layer measurements using large field of view PIV and hot-wire anemometry techniques. The time-resolved PIV method was used for the experiments. The measuring plane was oriented perpendicularly to the wall and parallel to the mean flow. Hot wire measurement has been performed using the special probe with perpendicular hot wire. The HW point measurements were performed in the same place as PIV experiments. The hot-wire probe has the wire length of l+θ. Reynolds number ranges from 1000 to 5500. The result shows that with the increasing Reynolds number the attenuation of fluctuations maximum in PIV measurements occurs with respect to Hot-Wire measurements, however representation of velocity fluctuations using the PIV method is satisfactory. The influence of wall-normal fluctuation component on Hot-Wire near wall peak was also investigated.