Experimental determination of tunnel ventilation axial ducted fan performance
To investigate traffic tunnel ventilation flows, a scaled model of a traffic tunnel with longitudinal ventilation system based on ducted fans is used. Flows in tunnels are influenced by tunnel geometry, fan characteristics, ventilation operation scenario, vehicle traffic, atmospheric factor...
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| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2016-01-01
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| Series: | Thermal Science |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0354-9836/2016/0354-98361400108S.pdf |
| Summary: | To investigate traffic tunnel ventilation flows, a scaled model of a traffic
tunnel with longitudinal ventilation system based on ducted fans is used.
Flows in tunnels are influenced by tunnel geometry, fan characteristics,
ventilation operation scenario, vehicle traffic, atmospheric factors, etc. To
analyze flow fields of tunnels in detail, knowledge of tunnel jet-fan
properties and turbulent flow characteristics at the fan exit are required,
and can be used as input data for CFD boundary conditions of tunnel flow
computation. For this purpose experimental measurements were done using the
hot wire anemometry technique. The obtained results, trough ensemble-averaged
and time averaged profiles of all velocity components, turbulence intensity,
turbulent kinetic energy, integral flow length scales, available Reynolds
stresses, Turbulent kinetic energy production rates and the fan thrust
performance, are presented. These data allow us to analyze in more detail the
influence of fan flow on energy and pollutant removal efficiencies of the
tunnel ventilation and to evaluate accuracy of CFD studies on fan
improvements. |
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| ISSN: | 0354-9836 2334-7163 |