Design of small climatic wind tunnel

In the small CWT, featuring a test section length of 31 m and an adjustable temperature range from -50°C to +60°C, a maximum wind speed of 120 km/h can be achieved.

The dynamometer for road vehicles installed in the central part of the test section has an input power of 250 kW and a maximum braking power of 300 kW.

The airflow to the front of the test object can be shut off completely by means of flaps installed at the head of the test section, in order to simulate, e.g., a stop-and-go cycle with doors opening.

Two outlets, one located in the ceiling and one in the wall in the central part of the tunnel, are designed to discharge exhaust gases from combustion engines. If both exhaust outlets are used simultaneously, the exhaust air volume discharged can be adjusted from 0.32 to 3.2 kg/s at 200°C. If only the wall exhaust outlet is used, an exhaust air volume of up to 0.7 kg/s at 600°C is possible (in particular for road vehicles).