- Title
- The effect of different X-wire calibration schemes on some turbulence statistics
- Creator
- Burattini, Paolo; Antonia, Robert A.
- Relation
- Experiments in Fluids Vol. 38, no. 1, p. 80-89
- Publisher
- Springer International
- Resource Type
- journal article
- Date
- 2005
- Description
- The effective-angle and look-up-table calibrations are used to reduce X-wire datasets in two flows: decaying grid turbulence at R(lambda)similar or equal to50 and the far field of a circular jet at R(lambda)similar or equal to400 with a mean streamwise velocity of nearly 6 ms(-1) in each case. A static check, which involves mean values of the velocity components, indicates that the effective-angle calibration incorrectly reduces the range of the estimated velocity components and is therefore likely to be less reliable than the look-up-table approach. The two methods produce significantly different results for both small- and large-scale statistics of the streamwise and, more especially, transverse velocity fluctuations. For grid turbulence, the mean-squared temporal derivatives of the streamwise and transverse velocities are larger by 3% and 19%, respectively, when estimated with the look-up-table method compared to the effective-angle calibration. The increase in the mean-squared transverse velocity derivative yields results in closer agreement with isotropy. At velocities below 6 ms(-1), the effective-angle is a quantity that strongly depends on the velocity magnitude and direction.
- Subject
- small-scale turbulence; reynolds-number; probes; jet; angle; flow; wall; anemometers; separation; spectra
- Identifier
- uon:64
- Identifier
- http://hdl.handle.net/1959.13/24429
- Identifier
- ISSN:0723-4864
- Language
- eng
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