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UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
UG_20090206_vanBeeck
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UG_20090206_vanBeeck

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Presentation of the contribution of the Von Karman Institute to the IWT SBO project on fire safety and explosion safety in car parks.

Presentation of the contribution of the Von Karman Institute to the IWT SBO project on fire safety and explosion safety in car parks.

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  • 1. von Karman Institute activities for SBO Project CarParks Jeroen van Beeck von Karman Institute Sint-Genesius-Rode www.vki.ac.be Meeting Place: WFRGent Date: 6-2-2009, 11:00 - 17:00 1/22 SBO Project CarParks 6/2/2009 WRFGent
  • 2. von Karman Institute for Fluid Dynamics VKI ACTIVITIES Education programs for graduate and undergraduate students. Organization of 10 Lecture Series / year. Consultant activities for industry. SBO Project CarParks 6/2/2009 WRFGent 2/22
  • 3. von Karman Institute for Fluid Dynamics VKI DEPARTMENTS Aerospace and Aeronautics Department Environmental and Applied Fluid Dynamics Department Turbomachinery and Propulsion Department Wind speed-up around new Belgian Pressure tap model of new Belgian Antarctic building Antarctic building CFD simulations Laboratory tests SBO Project CarParks 6/2/2009 WRFGent 3/22
  • 4. von Karman Institute for Fluid Dynamics VKI LARGE SCALE FACILITIES Subsonic Wind Tunnel (3m, 60m/s) Hypersonic Wind Tunnel (Mach 14, 2500K) High Pressure Turbine Stage (1 MW) Plasmatron (1.2 MW, Mach 2, 10000K)4/22 SBO Project CarParks 6/2/2009 WRFGent
  • 5. Scotch Gambit of Panamarenko in front of VKI on the occasion of its 50th Anniversary 1956-2006 von Karman Institute for Fluid Dynamics – AERONAUTICS & AEROSPACE • Hypersonic Aero-thermodynamics • Mars Reentry Vehicles, Arianne Launchers, Man-in-space – ENVIRONMENTAL & APPLIED FLUID DYNAMICS • Wind Loading, Wind Comfort, Pollutant Dispersion, Wind Energy • Multiphase Flows with Smoke, Bubbles, Snow & heat transfer • Aero-acoustics • Biological Flows – TURBOMACHINERY & PROPULSION • Unsteady Flows in Turbines, Compressors and Pumps Sint-Genesius-Rode • Film Cooling and Optimization of Turbine Blades www.vki.ac.be • Micro-turbines SBO Project CarParks 6/2/2009 WRFGent
  • 6. von Karman Institute for Fluid Dynamics VKI activities for CarParks • Characterization of Sprinkler systems • Small-scale wind tunnel tests • Full-scale field tests • Development of Large-Scale PIV for field tests SBO Project CarParks 6/2/2009 WRFGent 6/22
  • 7. von Karman Institute for Fluid Dynamics Sprinkler Characterization Phase Doppler Anemometry @ VKI Water Spray Facility WS-1 droplet size and velocity distributions & mass flow rates SBO Project CarParks 6/2/2009 WRFGent 7/22
  • 8. von Karman Institute for Fluid Dynamics Small-scale wind tunnel tests • Car park building, scale +/-1:20 -> 1.5m x 1.5m x 0.16m, CFD validation • Fire simulated by Helium gas source • Quantities to be monitored: – air velocity field using standard PIV; – Helium concentration by hot wire aspiration probes. • The parameters to be studied: – Helium flow rate; – External wind velocity; – Wind direction; – Jet fan speed. SBO Project CarParks 6/2/2009 WRFGent 8/22
  • 9. von Karman Institute for Fluid Dynamics VKI L-1B WIND TUNNEL, 20m x 3m x 2m Umax= 60 m/s SBO Project CarParks 6/2/2009 WRFGent 9/22
  • 10. von Karman Institute for Fluid Dynamics Field tests Equipment: – thermocouples for temperature measurements; – video equipment for registration of smoke movement -> LS PIV; – hot-spheres for gas velocity; – For the smoke density database, the installed smoke detectors will give valuable information for the database. LS PIV could possibly yield quantitative information on smoke density as well. Parameters: – Obstacles for smoke movement such as downstands, columns, smoke curtains; – Ventilation flow rate of the axial jet and induction fans; – hot flow tests with a pool fire; influence of different types of smoke extraction devices. SBO Project CarParks 6/2/2009 WRFGent 10/22
  • 11. von Karman Institute for Fluid Dynamics PARTICLE IMAGE VELOCIMETRY (PIV) CAMERA records particle image field on V=Δx / t2-t1 time t1 and t2, e.g. when laser pulses (1 vector / interrogation cell) 2D or 3D velocity field of an instantaneous spatial flow structure SBO Project CarParks 6/2/2009 WRFGent
  • 12. von Karman Institute for Fluid Dynamics ANNULAR VORTICES IN A JET SBO Project CarParks 6/2/2009 WRFGent 12/22
  • 13. von Karman Institute for Fluid Dynamics ANNULAR VORTICES IN A JET SBO Project CarParks 6/2/2009 WRFGent 13/22
  • 14. von Karman Institute for Fluid Dynamics PIV IMAGE PROCESSING Image Windowing Interrogation Search window Window time t1 time t2 SBO Project CarParks 6/2/2009 WRFGent 14/22
  • 15. von Karman Institute for Fluid Dynamics PIV IMAGE PROCESSING S31 r S19 S25 to δ to+Δt S13 S7 1 4 7 10 13 16 S1 19 22 25 28 31 V=δ/Δt Window displacement δ via maximum in cross-correlation function: N N ∑ ∑ I (i , j ) ⋅ S (i − m , j − n ) R (m , n ) = i = − N j= − N N N N N ∑ ∑ I 2 (i , j ) ⋅ ∑ ∑ ⋅ S 2 (i , j ) i = − N j= − N i = − N j= − N SBO Project CarParks 6/2/2009 WRFGent 15/22
  • 16. von Karman Institute for Fluid Dynamics ANNULAR VORTICES IN A JET SBO Project CarParks 6/2/2009 WRFGent 16/22
  • 17. von Karman Institute for Fluid Dynamics ANNULAR VORTICES IN A JET SBO Project CarParks 6/2/2009 WRFGent 17/22
  • 18. INSTANTANEOUS VELOCITY FIELD SBO Project CarParks 6/2/2009 WRFGent 18/22
  • 19. VORTICITY FIELD SBO Project CarParks 6/2/2009 WRFGent 19/22
  • 20. VORTICITY + VELOCITY SBO Project CarParks 6/2/2009 WRFGent 20/22
  • 21. von Karman Institute for Fluid Dynamics Large Scale PIV PIV is often applied to heat- Field of View: 1m X 1.3 m induced flows because it is a non- intrusive technique that is capable of measuring very low velocities at any temperature conditions. The current limitation is the maximum size of the flow-field of 30 cm x 30 cm because of the loss of resolution of tracers. Large Scale PIV (LS PIV) has been developed to overcome these limitations: A pattern recognition technique is applied to images of flow structures instead to images Von Karman vortices downstream a cylinder of tracer dots 16 cm diameter - Free stream velocity 0.23 m/s SBO Project CarParks 6/2/2009 WRFGent 21/22
  • 22. von Karman Institute for Fluid Dynamics VKI personnel involved in CarParks Jeroen van Beeck, Associate Professor (NL) Istvan Horvath, Ph.D candidate (H) Rosaria Vetrano, Research Engineer (It) Philippe Planquart, Research Engineer (B) Guillaume Diquas, Industrial Engineer (B) VKI Technicians for wind tunnel model construction and help in field tests SBO Project CarParks 6/2/2009 WRFGent 22/22

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