Please use this identifier to cite or link to this item: https://doi.org/10.1088/0957-0233/10/3/009
Title: The dynamic response of a hot-wire anemometer: III. Voltage-perturbation versus velocity-perturbation testing for near-wall hot-wire/film probes
Authors: Khoo, B.C. 
Chew, Y.T. 
Teo, C.J. 
Lim, C.P.
Keywords: Dynamic response
Flush-mounted hot wire
Hot-film wall shear-stress gauge
Near-wall hot wire
Square-wave test
Issue Date: Mar-1999
Citation: Khoo, B.C., Chew, Y.T., Teo, C.J., Lim, C.P. (1999-03). The dynamic response of a hot-wire anemometer: III. Voltage-perturbation versus velocity-perturbation testing for near-wall hot-wire/film probes. Measurement Science and Technology 10 (3) : 152-169. ScholarBank@NUS Repository. https://doi.org/10.1088/0957-0233/10/3/009
Abstract: Experiments were performed for the first time using the electronic square-wave voltage-perturbation test to systematically quantify the frequency response (fS) of near-wall hot-wire probes subjected in turn to varying magnitudes of convective velocity, different substrate materials and changes in wall-substrate temperature. In addition, quartz-substrate hot-film gauges with various thicknesses of quartz coating were also tested. Results of fS were compared against the dynamic frequency response (fD) previously obtained in parts I and II using a known near-wall fluctuating flow field. Although the observed trends for fD and fS were similar, their magnitudes were vastly different, notably for the commercially available hot-film gauges, or which fS was up to five orders of magnitude greater than fD. This signifies that there are possibly inherent differences between square-wave voltage-perturbation and velocity-perturbation tests for quantifying the frequency response of a hot-wire/hot-film system. These differences are then analysed in relation to the equation of a CTA unit put forth by Freymuth.
Source Title: Measurement Science and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/92797
ISSN: 09570233
DOI: 10.1088/0957-0233/10/3/009
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

20
checked on Dec 10, 2018

WEB OF SCIENCETM
Citations

19
checked on Dec 10, 2018

Page view(s)

39
checked on Dec 14, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.