Near-wall measurements of turbulence statistics in a fully developed channel flow with a novel laser Doppler velocity profile sensor

Katsuaki Shirai, Christian Bayer, Andreas Voigt, Thorsten Pfister, Lars Büttner, Jürgen Czarske

研究成果: Article査読

12 被引用数 (Scopus)

抄録

This paper reports on the measurements of the near-wall turbulence statistics in a fully developed channel flow. The flow measurements were carried out with a novel laser Doppler velocity profile sensor with a high spatial resolution. The sensor provides both the information of velocity and position of individual tracer particles inside the measurement volume. Hence, it yields the velocity profile inside the measurement volume, in principle, without the sensor being mechanically traversed. Two sensor systems were realized with different techniques. Typically the sensor has a relative accuracy of velocity measurement of 10-3 and the spatial resolution of a few micrometers inside the measurement volume of about 500 μm long. The streamwise velocity was measured with two independent sensor systems at three different Reynolds number conditions. The resulting turbulence statistics show a good agreement with available data of direct numerical simulations up to fourth order moment. This demonstrates the velocity profile sensor to be one of the promising techniques for turbulent flow research with the advantage of a spatial resolution more than one magnitude higher than a conventional laser Doppler technique.

本文言語English
ページ(範囲)567-578
ページ数12
ジャーナルEuropean Journal of Mechanics, B/Fluids
27
5
DOI
出版ステータスPublished - 2008 9
外部発表はい

ASJC Scopus subject areas

  • 数理物理学
  • 物理学および天文学(全般)

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