Abstract EN:

This study presents a methodological approach to evaluate the aerothermal comfort of spectators in stadia. Its extension raises some aspects of the spectators' visual and acoustic comfort. First, the conception of a comfort zone integrating the effect of temperature and wind has been developed based on the mechanical nuisance due to the wind and on the thermal effect of different temperature and wind speed combinations. Then, the effect of the morphology on the airflow inside the stadium has been investigated through wind tunnel tests in a boundary layer wind tunnel on a stadium model of variable geometry. The following architectural parameters have been modified: slope, overhang of the roof, façade porosity, stadium layout. Mean wind speed and standard deviation have been measured by hot wire anemometer at spectators' height in the bowl. The tests revealed that a relationship exists between the morphology and the airflow. The results associated with the meteorological data (temperature and wind speed) of a given site facilitate to define the frequency of comfort and discomfort. This methodology should be ideally applied in the design phase of the project. The roof position influences also the visual comfort of the spectators. The last has been analysed by daylight with an opaque roof. The visual comfort requirements are based on the uniform lighting conditions of the pitch; i. E. No accentuated contrast should appear on the pitch due to the shadow of the roof. A method facilitating the definition of the photometric morphology of the roof in order to prolong the visually comfortable period (localisation of the opaque and the transparent roof parts) has been developed.