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On the correction of hot wire turbulence measurements for spatial resolution errors

Published online by Cambridge University Press:  04 July 2016

J. B. Roberts
J. B. Roberts*
Affiliation:
University of Sussex
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Extract

Hot wire anemometers have found widespread use in the measurement of turbulence for many years. Recently, considerable improvements in the signal to noise ratio of these instruments has facilitated measurements in the high wavenumber region of the energy spectrum, where the turbulent energy level is usually relatively low.

Of major concern in the measurement of very small scale turbulent fluctuations by the hot wire method is the error introduced by the spatial averaging effect of the wire. Clearly, for fluctuations with wavelengths of the same order of magnitude as the wire length, or less, the line integration of the wire results in measured amplitudes which deviate considerably from those which would be recorded by a probe of infinitely small size.

Type
Technical notes
Information
The Aeronautical Journal , Volume 77 , Issue 752 , August 1973 , pp. 406 - 412
Copyright
Copyright © Royal Aeronautical Society 1973 

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References

1. Uberoi, M. S. and Kovasznay, K. S. G. On mapping and measurement of random fields. Q App Math, Vol 10, pp 375–393, 1953.Google Scholar
2. Wyngaard, J. C. Measurement of small-scale turbulence structure with hot wires. J. Scientific Instruments U. Physics E), Series 2, Vol 1, pp 1105–1108, 1968.Google Scholar
3. Pao, Y. H. Structure of turbulent velocity and scalar fields at large wavenumbers. Physics of Fluids, Vol 8, pp 1063–1075, 1965.Google Scholar
4. Roberts, J. B. and Surry, D. On coherence in gridgenerated turbulence, (to be published). Google Scholar
5. Batchelor, G. K. The theory of homogeneous turbulence. Cambridge University Press, 1953.Google Scholar
6. Courant, R. and Hilbert, D. Methods of mathematical physics. Vol 1, Interscience Pub Inc, New York, p 140, 1953.Google Scholar