Hot-wire anemometry is an established technique for velocity measurements in turbulent flows. Calibration of hot-wire probes is challenging due to the nonlinear relationship between the probe output voltage and the velocity, and the sensitivity to the temperature difference between the heated wire and the ambient flow. A triple-wire probe contains three mutually orthogonal wires that permit the three components of the local instantaneous velocity vector to be measured simultaneously. Calibration data reduction methods for multi-wire probes, based on variable-angle calibration techniques, may include curve-fits and direct-interpolation schemes. In the present study, a novel calibration data reduction method for a triple-wire probe is reported which uses an artificial neural network. Such a method has been successfully applied by other researchers for the calibration of seven-hole pressure probes. For the triple-wire probe, the neural network is used to produce a calibration relation between the three probe output voltages and the three components of the local velocity vector. Variable-angle calibration data were obtained for a triple-wire probe for velocity magnitudes from 5 to 40 m/s, yaw angles from −35° to +35°, and roll angles from 0° to 345°. A three-layer perceptron feed-forward network, using a Levenberg-Marquardt training algorithm, was applied to the calibration data, to map the mean voltages to the mean velocity components. The network was tested using an independent data set. The present results yielded standard errors of approximately ±0.38 m/s, ±0.25 m/s and ±0.26 m/s in the magnitudes of the streamwise, vertical, and cross-flow velocity components, respectively. The results showed that the present neural network model is not significantly sensitive to the size of the calibration data set, suggesting it may be a more convenient calibration data reduction method compared to other methods.
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ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
August 1–5, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4949-1
PROCEEDINGS PAPER
Calibration of Triple-Wire Probes Using an Artificial Neural Network Available to Purchase
Noorallah Rostamy,
Noorallah Rostamy
University of Saskatchewan, Saskatoon, SK, Canada
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Soheil Akbari,
Soheil Akbari
University of Saskatchewan, Saskatoon, SK, Canada
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David Sumner,
David Sumner
University of Saskatchewan, Saskatoon, SK, Canada
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Donald J. Bergstrom
Donald J. Bergstrom
University of Saskatchewan, Saskatoon, SK, Canada
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Noorallah Rostamy
University of Saskatchewan, Saskatoon, SK, Canada
Soheil Akbari
University of Saskatchewan, Saskatoon, SK, Canada
David Sumner
University of Saskatchewan, Saskatoon, SK, Canada
Donald J. Bergstrom
University of Saskatchewan, Saskatoon, SK, Canada
Paper No:
FEDSM-ICNMM2010-31198, pp. 217-224; 8 pages
Published Online:
March 1, 2011
Citation
Rostamy, N, Akbari, S, Sumner, D, & Bergstrom, DJ. "Calibration of Triple-Wire Probes Using an Artificial Neural Network." Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 2, Fora. Montreal, Quebec, Canada. August 1–5, 2010. pp. 217-224. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-31198
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