Phase-averaged flow statistics in compressors using a rotated hot-wire technique

A technique based on a rotated hot wire has been developed to characterise the unsteady, three-dimensional flow field between compressor blade rows. Data are acquired from a slanted hot wire rotated through a number of orientations at each measurement point. Phase-averaged velocity statistics are ob...

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Bibliographic Details
Published in:Experiments in fluids Vol. 58; no. 5; pp. 1 - 17
Main Authors: Jelly, T. O., Day, I. J., di Mare, L.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2017
Springer Nature B.V
Subjects:
Algorithms
Compressor blades
Compressors
Data acquisition
Engineering
Engineering Fluid Dynamics
Engineering Thermodynamics
Fluid- and Aerodynamics
Heat and Mass Transfer
Hot wire method
Research Article
Reynolds stress
Robustness (mathematics)
Statistics
Stator blades
Three dimensional flow
Wire
Turbomachinery
Turbulence
Hot-wire anemometry
ISSN:0723-4864, 1432-1114
Online Access:Get full text
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Summary:A technique based on a rotated hot wire has been developed to characterise the unsteady, three-dimensional flow field between compressor blade rows. Data are acquired from a slanted hot wire rotated through a number of orientations at each measurement point. Phase-averaged velocity statistics are obtained by solving a set of sensor response equations using a weighted, non-linear regression algorithm. The accuracy and robustness of the method were verified a priori by conducting a series of tests using synthetic data. The method is demonstrated by acquiring a full set of phase-averaged flow statistics in the wake of a compressor stator blade row. The technique allows three components of phase-averaged velocity, six components of phase-averaged deterministic stress, and six components of phase-averaged Reynolds stress to be recovered using a single rotated hot-wire probe.
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ISSN:0723-4864
1432-1114
DOI:10.1007/s00348-017-2326-x