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Calculation of the time-varying mean velocity by different methods and determination of the turbulence intensities

By Gökçen Bombar, Mehmet Şükrü Güney, Gökmen Tayfur and Şebnem Elçi

Abstract

The raw velocity data for both stream-wise and transversal directions in unsteady flows, which are formed by generating input hydrograph, are obtained by using a flow tracker. The same hydrograph is generated 15 times and the mean values are found by calculating the average of all hydrographs. The time varying mean is obtained by using FFT, moving average, wavelet and EMD methods. The best time varying mean is selected according to prescribed criteria. Then, the 15 time series are processed and the stream-wise and transversal turbulence intensities are obtained. The mean of the product of fluctuations is also determined. © 2010 Academic Journals.TÜBİTAK (project number 106M274

Topics: Unsteady flow, Data processing, Flow tracker, Instantaneous velocity measurement
Publisher: Academic Journals
Year: 2010
OAI identifier: oai:openaccess.iyte.edu.tr:8080:11147/2743
Provided by: DSpace@IZTECH
Journal:

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