Original title: Symmetry of turbulent characteristics inside urban intersection
Translated title: Symetrie turbulentních charakteristik uvnitř městské křižovatky
Authors: Kellnerová, Radka ; Jaňour, Zbyněk
Document type: Papers
Conference/Event: Colloquium Fluid Dynamics, Praha (CZ), 2007-10-24 / 2007-10-26
Year: 2007
Language: eng
Abstract: [eng] [cze]
The wind-tunnel modelling of dispersion is very sensitive to central symmetry. The asymmetry of concentration field inside the symmetrical model is often caused by two causes: inappropriate inlet conditions or non-symmetric set-up of model. The project has carried out the flow measurements by Laser Doppler Anemometer's probe merged into the tunnel. The aim was to investigate the flow processes inside the tunnel body-tube itself – i.e. without the model and inside the model of a symmetrical urban intersection. The influence of wind direction and model arrangement suppressing the lateral flow was tested. The largest deviations from symmetry were caused by the circumfluence of the measuring devices. Fyzikální modelování rozptylu je velmi citlivé na osovou symetrii. Asymetrie pole koncentrace je často způsobená dvěma faktory: nevhodnými vstupními podmínkami nebo nesymetrickou geometrií modelu. Experiment použil metodu LDA se sondou vnořenou do tunelu. Cílem bylo proměřit proudové procesy jednak v těle tunelu samotném, jednak na modelu symetrické křižovatky. Byl testován vliv směru proudění a vliv laterálních proudù. Největší vliv na asymetrii mělo obtékání měřících zařízení.
Keywords: asymetry; LDA; wind tunnel
Project no.: CEZ:AV0Z20760514 (CEP)
Host item entry: Colloquium FLUID DYNAMICS 2007, ISBN 978-80-87012-07-9

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0154287

Permalink: http://www.nusl.cz/ntk/nusl-38131


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers