Wind around the high-rise buildings

Predicting the behavior of the wind is possible in the wind tunnel at the Aerospace Research and Test Establisment (VZLU). Modeling of wind finds application across many industry sectors.

Wind Tunnel with simulated atmospheric boundary layer in VZLU is used for measuring wind loads for buildings and simulate wind conditions around them. Another use is in the area of ​​environmental studies related to scattering and emission of hazardous substances in the air. Using measurements from a wind tunnel can predict the snow of dust sedimentation and given the results suggest measures to prevent sedimentation in undesirable locations.

Determination of load structures can be carried out in existing buildings and in newly designed buildings with regard to design elements or unusual shapes facade.
 

New environmental applications. The effect of wind on pedestrians around buildings.


The interest of design offices grows for verification calculations using experiments in a wind tunnel with atmospheric boundary layer. The interest increases also in the simulation of air flow in residential areas and determine the wind conditions at pedestrian level. In the future, it is expected that the results of measurements from wind tunnels will be required by state authorities when approving the larger structural units, as well as it has in other countries.

Wind Tunnel in VZLU, also called BLWT tunnel (Boundary Layer Wind Tunnel), has also its application for measurement of emission dispersion in the countryside or in urban areas, so called “Environmental studies”. BLWT tunnel finds its application in civil defense, which allows the simulation of dispersion of hazardous substances during emergencies and on that basis, such as preparing emergency evacuation plans.

From the boundary conditions on the model set out in the experiment in wind tunnel can be used CFD method (Computational Fluid Dynamics) to simulate the flow or spread of smoke in subways or monitor air flow in the complicated details of modeled objects.
 

When you know how the wind behaves, you can save


Determination of load modeling wind tunnel leads very often to the substantial savings in material relative to the design values ​​according to the standards. By slim-dimensional structures, typically at bridges, tall buildings, masts, towers or chimneys experiments on the contrary reveals critical modes of behavior in the strong wind.

Another example is the prediction of the pressure distribution on the facade of a building combined with wind statistics, which leads to optimize the design of the ventilation system of the building. Finally, it is possible to predict the behavior of long-term resource emission issues eg. incinerators from paint shops or in combination with wind statistics to achieve savings in follow-up with the suppression of air pollution toward populated areas.
 

Even on to the platform you can feel comfortable


In the rail sector in addition to optimizing the shape of train modeling results may also contribute to the optimization of air conditioning, ventilation and heating output during high-speed operation. Modeling can also monitor the safety of passengers in trains (trains moving in opposite directions, train at the entrance to the tunnel), wind conditions for pedestrians on the platform (risk gust of wind) etc.