Wind Tunnel Balance System for Vehicle Aerodynamic Developments

By: Hans Vogt

8 February 2010

In vehicle development steps, optimization of aerodynamic properties is often carried out in wind tunnel facilities. The vehicle is placed upon the measuring platform of the balance. The wind tunnel balance now allows the precise measurement of six forces and moments induced by the air fl ow. The HORIBA wind tunnel balance system can be equipped with a moving ground system which makes the air flow at the underside and around the wheels much more realistic. This moving ground system is built up of a central moving belt unit which is running at wind speed between the wheels and of four wheel spinning units which are rotating the wheels with wind speed. In this case the four wheel spinning units are also part of the force measuring system of the balance. Maximum speeds of up to 250 km/h are possible.

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