Sensitivity of turbulent stresses in boundary layers to cross-wire probe uncertainties in the geometry and calibration procedure

R Baidya; J Philip; N Hutchins; JP Monty; I Marusic

Journal article

Sensitivity of turbulent stresses in boundary layers to cross-wire probe uncertainties in the geometry and calibration procedure

R Baidya, J Philip, N Hutchins, JP Monty, I Marusic

Measurement Science and Technology | IOP Publishing | Published : 2019

DOI: 10.1088/1361-6501/ab1491

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Abstract

The sensitivity of measured turbulent stresses to uncertainties in the probe geometry and calibration procedure is investigated for a cross-wire probe in a turbulent boundary layer using direct numerical simulation data. The errors investigated are guided by experiments, and to replicate the full experimental procedure, the cross-wire calibration procedure is simulated to generate a voltage-to-velocity mapping function, which is then utilised to calculate the measured velocity from simulated cross-wire voltages. We show that wire misalignment can lead to an incorrect mean wall-normal velocity and Reynolds shear stress in the near-wall region due to the presence of shear. Furthermore, we find..

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University of Melbourne Researchers

Rio Baidya Author

Jimmy Philip Author

Nicholas Hutchins Author

Jason Monty Author

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Grants

Awarded by Australian Research Council

Funding Acknowledgements

The authors gratefully acknowledge the financial support from the Australian Research Council. The authors would also like to thank Prof. R. D. Moser for making the channel DNS database available.