Periodic Disturbance in Turbulent Boundary Layer Method to Study on the Mechanical Properties of the Perturbation Velocity Component

Abstract:

Time-series signals of normal velocity component with different flow direction and normal position of the turbulent boundary layer which were disturbed before and after the different frequency period were made elaborate measurement in the wind tunnel with the sampling frequency higher than the correspondent smallest turbulence structure time scale,IFA300 hot-wire anemometer and TSI-1243 double hot-wire senor probe were used in the experiment. The average waveform of the period phase of the period disturbance velocity signals were extracted in the instantaneous normal velocity component signals of the turbulent boundary layer. The attenuation and distortion along the flow direction and the normal of the disturbance wave with different period in the turbulent boundary layer were made experimental research, the distribution of the disturbance amplitude of the normal velocity component with different disturbance period along the flow direction and the normal in the turbulent boundary layer were measured.

• Periodical: Applied Mechanics and Materials (Volume 310)
• Pages: 213-217
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.310.213
• Online since: February 2013
• Authors: Gang Li Hao, Xu Li Liang, Shu Jian Zhang
• Keywords: Hot-Wire Anemometer, Periodic Blowing Artificial Disturbance, Periodic Suction Artificial Disturbance, Turbulent Boundary Layer

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