Abstract
Phase-locked PIV measurement technique is used to estimate the acoustic velocity in the presence of turbulent flow inside a rectangular duct. The acoustic field is generated by compression drivers mounted on the sides of a rectangular duct. The PIV measurements are synchronized with the compression drivers. The measured velocity fields can be decomposed to mean flow velocity, turbulent fluctuations and acoustic velocity. A post-processing technique is proposed to extract the acoustic velocity field from the total measured velocity field. Also, the uncertainty of the estimated acoustic velocity is calculated using two different techniques, namely peak ratio method and particle disparity method. The estimated acoustic velocity agrees with the acoustic velocity estimated from classical microphone’s measurement technique. The estimated uncertainty of the acoustic velocity is found to be 18%.
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Rampnoux, S., Ramadan, I., Moreau, S., Ben Tahar, M. (2023). Acoustic Velocity Estimation in the Presence of Steady Flow Using Particle Image Velocimetry. In: Akrout, A., Abdennadher, M., Feki, N., Abbes, M.S., Chaari, F., Haddar, M. (eds) Advances in Acoustics and Vibration IV. ICAV 2022. Applied Condition Monitoring, vol 22. Springer, Cham. https://doi.org/10.1007/978-3-031-34190-8_28
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