Binormal cooling errors in single hot-wire measurements

• Autorzy: Örlü R. , Alfredsson P. H.

Identyfikatory

DOI

10.15632/jtam-pl.54.1.305

• Języki publikacji: EN

Abstrakty

EN

In single-wire hot-wire measurements, velocity fluctuations acting normal to the hot-wire and its prongs will cause additional heat transfer known as binormal cooling. With respect to wall turbulence, the influence of this additional cooling is well-studied for crossed wires, while it is commonly ignored in single hot-wire measurements. The latter view is challenged in the recent work by Dróżdż and Elsner (2014) that claims significant errors in variance measurements when using single-wire probes in turbulent boundary layers. This short communication revisits these claims and quantifies binormal cooling errors through an expansion of the effective-velocity concept and utilisation of direct numerical simulation data. Results support the common habit that binormal cooling errors can safely be ignored in single hot-wire measurements.

Słowa kluczowe

EN

hot-wire anemometry; measurement errors; wall turbulence

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2016
• Tom: Vol. 54 nr 1
• Strony: 305--310
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Örlü R.

• Linné FLOW Centre, KTH Mechanics, Stockholm, Sweden

autor

Alfredsson P. H.

• Linné FLOW Centre, KTH Mechanics, Stockholm, Sweden

Bibliografia

• 1. Alfredsson P.H., Segalini A., Orlu R., 2011, A new scaling for the streamwise turbulence intensity in wall-bounded turbulent flows and what it tells us about the “outer” peak, Physics of Fluids, 23, 041702
• 2. Bruun H.H., 1995, Hot-Wire Anemometry: Principles and Signal Analysis, Oxford University Press Inc., New York, USA
• 3. Dróżdż A., Elsner W., 2014, Comparison of single and X-wire measurements of streamwise velocity fluctuations in turbulent boundary layer, Journal of Theoretical and Applied Mechanics, 52, 499-505
• 4. Dróżdż A., Elsner W., 2015, Analysis of hot-wire measurements accuracy in turbulent boundary, Open English, 5, 307-313
• 5. Dróżdż A., Uruba V., 2014, Comparison of PIV and hot-wire statistics of turbulent boundary layer, Journal of Physics: Conference Series, 530, 012044
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• 7. Hutchins N., Nickels T.B., Marusic I., Chong M.S., 2009, Hot-wire spatial resolution issues in wall-bounded turbulence, Journal of Fluid Mechanics, 635, 103-136
• 8. Jørgensen F.E., 1971, Directional sensitivity of wire and fiber-film probes, DISA Information, 11, 31-37
• 9. Kalpakli Vester A., Sattarzadeh S.S., Orlu R., 2015, Combined hot-wire and PIV measurements of a swirling turbulent flow at the exit of a 90◦ pipe bend, Journal of Visualization, doi:10.1007/s12650-015-0310-1
• 10. Miller M.A., Estejab B., Bailey S.C.C., 2014, Evaluation of hot-wire spatial filtering corrections for wall turbulence and correction for end-conduction effects, Experiments in Fluids, 55, 1735
• 11. Orlu R., Alfredsson P.H., 2010, On spatial resolution issues related to time-averaged quantities using hot-wire anemometry, Experiments in Fluids, 49, 101-110
• 12. Orlu R., Alfredsson P.H., 2012, Comment on the scaling of the near-wall streamwise variance peak in turbulent pipe flows, Experiments in Fluids, 54, 1431
• 13. Orlu R., Malizia F., Cimarelli A., Schlatter P., Talamelli A., 2014, The influence of temperature fluctuations on hot-wire measurements in wall-bounded turbulence, Experiments in Fluids, 55, 1781
• 14. Orlu R., Schlatter P., 2013, Comparison of experiments and simulations for zero pressure gradient turbulent boundary layers at moderate Reynolds numbers, Experiments in Fluids, 54, 1547
• 15. Ovink R., Lamers A.P.G.G., van Steenhoven A.A., Hoeijmakers H.W.M., 2001, A method of correction for the binormal velocity fluctuation using the look-up inversion method for hot-wire anemometry, Measurement Science and Technology, 12, 1208
• 16. Schlatter P., Orlu R., 2010, Assessment of direct numerical simulation data of turbulent boundary layers, Journal of Fluid Mechanics, 659, 116-126
• 17. Segalini A., Orlu R., Schlatter P., Alfredsson P.H., Ruedi J.D., Talamelli A., 2011, A method to estimate turbulence intensity and transverse Taylor microscale in turbulent flows from spatially averaged hot-wire data, Experiments in Fluids, 51, 693-700
• 18. Smits A.J., Monty J.P., Hultmark M., Bailey S.C.C., Hutchins N., Marusic I., 2011, Spatial resolution correction for wall-bounded turbulence measurements, Journal of Fluid Mechanics, 676, 41-53
• 19. Talamelli A., Westin K.J.A., Alfredsson P.H., 2000, An experimental investigation of the response of hot-wire X-probes in shear flows, Experiments in Fluids, 28, 425-435
• 20. Zhao R., Smits A.J., 2006, Binormal cooling errors in crossed hot-wire measurements, Experiments in Fluids, 40, 212-217

Uwagi

EN

Short Research Communication

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniajacą naukę.