TY - JOUR
TI - Experimental determination of tunnel ventilation axial ducted fan performance
AU - Šekularac Milan B
JN - Thermal Science
PY - 2016
VL - 20
IS - 1
SP - 209
EP - 221
PT - Article
AB - 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.