Two-point correlation estimation of turbulent shear flows using a novel laser Doppler velocity profile sensor

M. Neumann, Katsuaki Shirai, L. Büttner, J. Czarske

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this paper we describe, for the first time, a new method of two-point correlation estimations of turbulent flows using a laser Doppler velocity profile sensor. For the spatial correlation estimations the laser Doppler velocity profile sensor offers unique opportunities since a high spatial resolution of approximately 20 micron within the measurement volume is achieved. Furthermore, the low relative velocity measurement uncertainty of about 0.1% yields a high resolution of small velocity fluctuations and, therefore, allows correlation investigations where such high resolution is required. Moreover, a new virtual detection volume technique is presented which is only applicable in conjunction with the laser Doppler velocity profile sensor and offers the potential to achieve highly precise spatial correlation estimations. Measurements have been carried out in the turbulent wake of a circular. Both temporal as well as spatial correlation estimations have been calculated from the acquired velocity data yielding a longitudinal Taylor microscale of 3.53 mm and a transverse Taylor microscale of 1.84 mm.

Original languageEnglish
Pages (from-to)252-263
Number of pages12
JournalFlow Measurement and Instrumentation
Volume20
Issue number6
DOIs
Publication statusPublished - 2009 Dec
Externally publishedYes

Fingerprint

Shear flow
shear flow
velocity distribution
Lasers
sensors
Sensors
lasers
microbalances
high resolution
turbulent wakes
Volume measurement
velocity measurement
Velocity measurement
turbulent flow
Turbulent flow
spatial resolution

Keywords

  • Laser Doppler velocity profile sensor
  • Spatio-temporal correlation
  • Taylor microscale
  • Temporal correlation
  • Two-point correlation

ASJC Scopus subject areas

  • Instrumentation
  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

Two-point correlation estimation of turbulent shear flows using a novel laser Doppler velocity profile sensor. / Neumann, M.; Shirai, Katsuaki; Büttner, L.; Czarske, J.

In: Flow Measurement and Instrumentation, Vol. 20, No. 6, 12.2009, p. 252-263.

Research output: Contribution to journalArticle

@article{10609ca8f0b446c884e68e27cd53ac71,
title = "Two-point correlation estimation of turbulent shear flows using a novel laser Doppler velocity profile sensor",
abstract = "In this paper we describe, for the first time, a new method of two-point correlation estimations of turbulent flows using a laser Doppler velocity profile sensor. For the spatial correlation estimations the laser Doppler velocity profile sensor offers unique opportunities since a high spatial resolution of approximately 20 micron within the measurement volume is achieved. Furthermore, the low relative velocity measurement uncertainty of about 0.1{\%} yields a high resolution of small velocity fluctuations and, therefore, allows correlation investigations where such high resolution is required. Moreover, a new virtual detection volume technique is presented which is only applicable in conjunction with the laser Doppler velocity profile sensor and offers the potential to achieve highly precise spatial correlation estimations. Measurements have been carried out in the turbulent wake of a circular. Both temporal as well as spatial correlation estimations have been calculated from the acquired velocity data yielding a longitudinal Taylor microscale of 3.53 mm and a transverse Taylor microscale of 1.84 mm.",
keywords = "Laser Doppler velocity profile sensor, Spatio-temporal correlation, Taylor microscale, Temporal correlation, Two-point correlation",
author = "M. Neumann and Katsuaki Shirai and L. B{\"u}ttner and J. Czarske",
year = "2009",
month = "12",
doi = "10.1016/j.flowmeasinst.2009.09.001",
language = "English",
volume = "20",
pages = "252--263",
journal = "Flow Measurement and Instrumentation",
issn = "0955-5986",
publisher = "Elsevier BV",
number = "6",

}

TY - JOUR

T1 - Two-point correlation estimation of turbulent shear flows using a novel laser Doppler velocity profile sensor

AU - Neumann, M.

AU - Shirai, Katsuaki

AU - Büttner, L.

AU - Czarske, J.

PY - 2009/12

Y1 - 2009/12

N2 - In this paper we describe, for the first time, a new method of two-point correlation estimations of turbulent flows using a laser Doppler velocity profile sensor. For the spatial correlation estimations the laser Doppler velocity profile sensor offers unique opportunities since a high spatial resolution of approximately 20 micron within the measurement volume is achieved. Furthermore, the low relative velocity measurement uncertainty of about 0.1% yields a high resolution of small velocity fluctuations and, therefore, allows correlation investigations where such high resolution is required. Moreover, a new virtual detection volume technique is presented which is only applicable in conjunction with the laser Doppler velocity profile sensor and offers the potential to achieve highly precise spatial correlation estimations. Measurements have been carried out in the turbulent wake of a circular. Both temporal as well as spatial correlation estimations have been calculated from the acquired velocity data yielding a longitudinal Taylor microscale of 3.53 mm and a transverse Taylor microscale of 1.84 mm.

AB - In this paper we describe, for the first time, a new method of two-point correlation estimations of turbulent flows using a laser Doppler velocity profile sensor. For the spatial correlation estimations the laser Doppler velocity profile sensor offers unique opportunities since a high spatial resolution of approximately 20 micron within the measurement volume is achieved. Furthermore, the low relative velocity measurement uncertainty of about 0.1% yields a high resolution of small velocity fluctuations and, therefore, allows correlation investigations where such high resolution is required. Moreover, a new virtual detection volume technique is presented which is only applicable in conjunction with the laser Doppler velocity profile sensor and offers the potential to achieve highly precise spatial correlation estimations. Measurements have been carried out in the turbulent wake of a circular. Both temporal as well as spatial correlation estimations have been calculated from the acquired velocity data yielding a longitudinal Taylor microscale of 3.53 mm and a transverse Taylor microscale of 1.84 mm.

KW - Laser Doppler velocity profile sensor

KW - Spatio-temporal correlation

KW - Taylor microscale

KW - Temporal correlation

KW - Two-point correlation

UR - http://www.scopus.com/inward/record.url?scp=70350417626&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70350417626&partnerID=8YFLogxK

U2 - 10.1016/j.flowmeasinst.2009.09.001

DO - 10.1016/j.flowmeasinst.2009.09.001

M3 - Article

AN - SCOPUS:70350417626

VL - 20

SP - 252

EP - 263

JO - Flow Measurement and Instrumentation

JF - Flow Measurement and Instrumentation

SN - 0955-5986

IS - 6

ER -