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pRTA (Probe Recovery Temperature Anemometry)

[+] Author Affiliations
Masahiro Ishibashi

Metrology Institute of Japan/AIST, Tsukuba, Ibaraki, Japan

Paper No. HT-FED2004-56806, pp. 613-618; 6 pages
doi:10.1115/HT-FED2004-56806
From:
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 1
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4690-3 | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME

abstract

It is shown that the recovery temperature measured by a thin thermocouple wire inserted in airflow does not depend on the angle of incidence of the flow onto the wire and agrees very well with the theoretical value assuming the recovery factor of the square root of the Prandtl number. This fact allows RTA (Recovery Temperature Anemometry) employing a sensor of various structures; pRTA (probe RTA) is one of the examples where the thermocouple wire is bent at its contact point forming the probe apex. The paper demonstrates that pRTA measures the same flow velocity distributions in a critical nozzle as those by sRTA (streamwise RTA) where a thermocouple wire is settled parallel to the axis of symmetry of the nozzle.

Copyright © 2004 by ASME
Topics: Temperature , Probes

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