TY - JOUR
T1 - Impact of Pitot tube diameter on the centre line mean flow velocity in multi-scale grid-generated turbulence
AU - Yamaguchi, Hiroto
AU - Suzuki, Hiroki
AU - Tanaka, Kento
AU - Kouchi, Toshinori
N1 - Funding Information:
This work was partly supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology through Grants-in-Aid (Nos. 20H02069 and 21K03859). This work was supported (in part) by Grant for Environmental Research Projects from The Sumitomo Foundation.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2022
Y1 - 2022
N2 - In this study, the impact of the leading-edge diameter of a Pitot tube on the mean flow of the decaying turbulence generated by a multi-scale grid was investigated. Standard Pitot tubes with leading edge diameters of 4 and 6 mm were used in this study, and a multi-scale grid was installed at the entrance of the test section to generate the decaying turbulence. The characteristic velocity was observed to be 2.8 m/s. In the downstream region of the test section, the mean velocities measured with the two Pitot tubes were in sufficiently good agreement, as well as the acceleration parameters calculated in this region. However, in the upstream region, the mean flow velocities obtained with the two Pitot tubes were slightly different. The thin Pitot tube showed a higher mean flow velocity in this region, corresponding to the jet-like structure that has been described in previous research. In contrast, this higher mean velocity in the upstream region was not observed in the mean flow velocity distribution obtained with the thick Pitot tube. This difference is discussed here from the perspective of the turbulent component and measurement uncertainty.
AB - In this study, the impact of the leading-edge diameter of a Pitot tube on the mean flow of the decaying turbulence generated by a multi-scale grid was investigated. Standard Pitot tubes with leading edge diameters of 4 and 6 mm were used in this study, and a multi-scale grid was installed at the entrance of the test section to generate the decaying turbulence. The characteristic velocity was observed to be 2.8 m/s. In the downstream region of the test section, the mean velocities measured with the two Pitot tubes were in sufficiently good agreement, as well as the acceleration parameters calculated in this region. However, in the upstream region, the mean flow velocities obtained with the two Pitot tubes were slightly different. The thin Pitot tube showed a higher mean flow velocity in this region, corresponding to the jet-like structure that has been described in previous research. In contrast, this higher mean velocity in the upstream region was not observed in the mean flow velocity distribution obtained with the thick Pitot tube. This difference is discussed here from the perspective of the turbulent component and measurement uncertainty.
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U2 - 10.1088/1742-6596/2313/1/012001
DO - 10.1088/1742-6596/2313/1/012001
M3 - Conference article
AN - SCOPUS:85136794421
SN - 1742-6588
VL - 2313
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012001
T2 - 5th International Conference on Physics, Mathematics and Statistics, ICPMS 2022
Y2 - 21 May 2022 through 22 May 2022
ER -