Journal article

A scheme to correct the influence of calibration misalignment for cross-wire probes in turbulent shear flows

Rahul Deshpande, Jason P Monty, Ivan Marusic

Experiments in Fluids | Springer | Published : 2020

Abstract

Velocity fluctuations, measured via multi-wire probes, are very sensitive to misalignment between the calibration coordinate system and that of the wind tunnel. The present study proposes a scheme to correct the erroneous velocity fluctuations processed from a misaligned calibration while investigating a wall-bounded turbulent shear flow. The scheme is based on the premise that the viscous-scaled spectral energy distribution in the small-scales is invariant with Reynolds number and solely depends on the viscous-scaled spatial resolution of the sensor. Energy spectra processed from the misaligned calibration, in this small-scale range, are compared with the ‘expected’ spectra obtained via syn..

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Grants

Awarded by Australian Research Council


Funding Acknowledgements

The authors would like to thank Dr. Rio Baidya for helpful discussions and sharing his code for the synthetic experiments on the DNS data set. They also thank the authors of del Alamo et al. (2004) for making their DNS data available. Financial support of this research from the Australian Research Council (Grant No. DP180100447) is gratefully acknowledged.