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Measurements in a Turbulent Channel Flow by Means of an LDV Profile Sensor
Institute of Fluids Mechanics (ISTM), Karlsruhe Institute of Technology (KIT), Kaiserstraße 10, 76131, Karlsruhe, Germany, Kaiserstraße 10.
Institute of Fluids Mechanics (ISTM), Karlsruhe Institute of Technology (KIT), Kaiserstraße 10, 76131, Karlsruhe, Germany, Kaiserstraße 10.
Institute of Fluids Mechanics (ISTM), Karlsruhe Institute of Technology (KIT), Kaiserstraße 10, 76131, Karlsruhe, Germany, Kaiserstraße 10.
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics.ORCID iD: 0000-0002-1663-3553
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2024 (English)In: Flow Turbulence and Combustion, ISSN 1386-6184, E-ISSN 1573-1987, Vol. 113, no 1, p. 195-213Article in journal (Refereed) Published
Abstract [en]

Spatially and temporally resolved velocity measurements in wall-bounded turbulent flows remain a challenge. Contrary to classical laser Doppler velocimetry (LDV) measurements, the laser Doppler velocity profile sensor (LDV-PS) allows the combined measurement of tracer particle position and velocity, which makes it a promising tool. To assess its feasibility a commercial LDV-PS is employed in a turbulent channel flow at Reτ= 350 . Additionally, the measurement and signal-processing accuracies of velocity and location are evaluated for various tracer-object sizes and velocities. On this basis, the turbulent channel flow measurements are evaluated and compared to reference data from direct numerical simulations. Thus, potentials of the LDV-PS are investigated for different regions of the flow and various data processing routines as well as the experimental practice are discussed from an application perspective.

Place, publisher, year, edition, pages
Springer Nature , 2024. Vol. 113, no 1, p. 195-213
Keywords [en]
LDV profile sensor, Near-wall measurements, Turbulent channel flow
National Category
Fluid Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-350320DOI: 10.1007/s10494-023-00469-4ISI: 001063147700001Scopus ID: 2-s2.0-85170404471OAI: oai:DiVA.org:kth-350320DiVA, id: diva2:1883819
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QC 20240711

Available from: 2024-07-11 Created: 2024-07-11 Last updated: 2025-02-09Bibliographically approved

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Örlü, Ramis

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