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Optimal calibration of directional velocity probes

Shaw-Ward, Samantha, McParlin, Stephen, Nathan, Paul and Birch, David M. (2018) Optimal calibration of directional velocity probes AIAA Journal, 56 (7). pp. 2594-2603.

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The calibration of directional velocity probes can require significant facility time and resources, especially if carried out in situ. The techniques of design of experiments are therefore applied in order to formally optimize the selection of calibration points. A model is proposed for a generalized directional velocity probe, and this model is used to generate an approximate, polynomial response surface model which is shown to agree well with measurements from both multi-sensor hot-wire probes and multi-hole pressure probes, in a variety of geometries. The process of D-optimality is then applied based on this response surface model, and a typical probe is calibrated accordingly. The probe is then used to scan the wake of a vortex generator, in order to test the efficacy of the reduced calibrations. D-optimal calibration points are shown to offer a significant improvement in data fidelity over conventional rectangular grids, and minimal additional uncertainty is incurred after a 25-fold reduction in the number of calibration points.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Shaw-Ward, Samantha
Birch, David
Date : 23 May 2018
Funders : Engineering and Physical Sciences Research Council (EPSRC)
DOI : 10.2514/1.J056762
Copyright Disclaimer : Copyright © 2018 by the American Institute of Aeronautics and Astronautics, Inc.
Depositing User : Clive Harris
Date Deposited : 06 Apr 2018 07:34
Last Modified : 06 Jul 2019 05:25

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