The response of hot wires in high Reynolds-number turbulent pipe flow

1737 33 47264 2 2369009 document 47264 lightbox.jpg image/png ed459215720c8b6da683c4bf16ea90b7 MD5 58379 2020-05-04 23:46:57 https://vuir.vu.edu.au/1737/2/lightbox.jpg 1737 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en staffonly

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http://eprints.org/relation/isVersionOf https://vuir.vu.edu.au/id/dark_document/47254 http://eprints.org/relation/isVolatileVersionOf https://vuir.vu.edu.au/id/dark_document/47254 http://eprints.org/relation/issmallThumbnailVersionOf https://vuir.vu.edu.au/id/dark_document/47254 archive 293 disk0/00/00/17/37 2009-02-15 15:38:26 2021-08-27 07:42:04 2009-02-15 15:38:26 article show Li Jun-de Li, Jun-de McKeon B. J McKeon, B. J Jiang W Jiang, W Morrison J. F Morrison, J. F Smits A. J Smits, A. J The response of hot wires in high Reynolds-number turbulent pipe flow pub 290000 tafeengineering fluid flow velocity, thermal anemometry, turbulence diagnostics Issues concerning the accuracy of hot-wire measurements in turbulent pipe flow are addressed for pipe Reynolds numbers up to 6 x 106 and hot-wire Reynolds numbers up to Rew 250. These include the optimization of spatial and temporal resolution and the associated feature of signal-to-noise ratio. Very high wire Reynolds numbers enable the use of wires with reduced length-to-diameter ratios compared to those typical of atmospheric conditions owing to increased wire Nusselt numbers. Simulation of the steady-state heat balance for the wire and the unetched portion of wire are used to assess static end-conduction effects: they are used to calculate wire Biot numbers, c0l, and fractional end-conduction losses, a, which confirm the 'conduction-only' theory described by Corrsin. They show that, at Rew 250, the wire length-to-diameter ratio can be reduced to about 50, while keeping c0l > 3 and a < 7% in common with accepted limits at Rew 3. It is shown that these limits depend additionally on the choice of wire material and the length of unetched wire. The dynamic effects of end-cooling are also assessed using the conduction-only theory. 2004 published Institute of Physics Publishing 10.1088/0957-0233/15/5/003 http://dx.doi.org/10.1088/0957-0233/15/5/003 47254 2 2368995 dark_document 47254 Li Jun-De.pdf application/pdf 37bbf1fd1f44f925a4dc3a7bfa3dc94c MD5 72197 2020-05-04 23:36:37 1737 1 1 application/pdf text Submission & Permission Form en staffonly

Li Jun-De.pdf

other none Measurement Science and Technology 15 5 789-798 TRUE 0957-0233 FALSE 20 2-s2.0-2542455563 2023-07-02 04:01:06