Highly precise correlation estimates of turbulent sheer flows using a novel laser doppler profile sensor

Mathias Neumann, Katsuaki Shirai, Andreas Voigt, Lars Büttner, Jürgen Czarske

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

For the characterisation of small vortices within turbulent flow fields the Taylor length scale is often used. This length scale can be extrapolated out of two-point correlation estimations for which the flow velocity has to be measured precisely at two different positions in the flow. The application of the laser Doppler velocity profile sensor, which offers a high spatial resolution within the measurement volume (around 10 μm) and a low velocity measurement uncertainty of about 0.1 %, for vortex investigations is, therefore, an interesting novel approach. Moreover, the system offers the advantage of extrapolating the Taylor length scale with data from only one sensor which is not possible with conventional laser Doppler velocimetry. Due to the high spatial resolution of profile sensor, problems which occur when the detection volumes overlap do not occur in contrast to conventional systems. We present measurements which have been carried out in the turbulent wake of a circular cylinder. Both temporal as well as spatial correlation estimations have been calculated out of the acquired velocity data.

Original languageEnglish
Pages1031-1036
Number of pages6
Publication statusPublished - 2009 Jan 1
Externally publishedYes
Event6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009 - Seoul, Korea, Republic of
Duration: 2009 Jun 222009 Jun 24

Other

Other6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009
CountryKorea, Republic of
CitySeoul
Period09/6/2209/6/24

Fingerprint

Turbulent flow
Velocity measurement
Lasers
Sensors
Vortex flow
Volume measurement
Circular cylinders
Flow velocity
Flow fields
Uncertainty

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Neumann, M., Shirai, K., Voigt, A., Büttner, L., & Czarske, J. (2009). Highly precise correlation estimates of turbulent sheer flows using a novel laser doppler profile sensor. 1031-1036. Paper presented at 6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009, Seoul, Korea, Republic of.

Highly precise correlation estimates of turbulent sheer flows using a novel laser doppler profile sensor. / Neumann, Mathias; Shirai, Katsuaki; Voigt, Andreas; Büttner, Lars; Czarske, Jürgen.

2009. 1031-1036 Paper presented at 6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009, Seoul, Korea, Republic of.

Research output: Contribution to conferencePaper

Neumann, M, Shirai, K, Voigt, A, Büttner, L & Czarske, J 2009, 'Highly precise correlation estimates of turbulent sheer flows using a novel laser doppler profile sensor' Paper presented at 6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009, Seoul, Korea, Republic of, 09/6/22 - 09/6/24, pp. 1031-1036.
Neumann M, Shirai K, Voigt A, Büttner L, Czarske J. Highly precise correlation estimates of turbulent sheer flows using a novel laser doppler profile sensor. 2009. Paper presented at 6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009, Seoul, Korea, Republic of.
Neumann, Mathias ; Shirai, Katsuaki ; Voigt, Andreas ; Büttner, Lars ; Czarske, Jürgen. / Highly precise correlation estimates of turbulent sheer flows using a novel laser doppler profile sensor. Paper presented at 6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009, Seoul, Korea, Republic of.6 p.
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