Automobile wind tunnel test technology and vehicle commissioning check TOP4
In the absence of an environmental wind tunnel, the thermodynamic test of the vehicle depends on the face of God. With the environmental wind tunnel, the simulation environment can be fully utilized for the development of the whole vehicle in 12 months a year. It is conceivable that both R&D costs and time are better controlled, which greatly improves work efficiency.
First, the temperature simulation
At present, the temperature simulation range of the international mainstream automotive wind tunnel can reach -40 ° C ~ +60 ° C. The low temperature of -40 ° C is a very low temperature. Usually, a secondary refrigeration system is used in the wind tunnel to achieve low temperature control, that is, another set of refrigerant system is introduced into the ordinary refrigeration system, and the brine needs to have excellent heat conduction. Performance and stability. The brine is heat exchanged through the coil in the wind tunnel. The temperature control accuracy in the flow channel can reach ±0.5 °C, that is, if the simulated ambient temperature is -30 °C, the temperature in the wind tunnel can reach -30.5 °C ~ -29.5 °C.
Wind tunnel refrigeration equipment
High-temperature simulation generally uses electric heating or boiler heating to obtain heat, or electric heating combined with boiler heating, so that energy can be accurately controlled while maintaining temperature. Simulating the ambient temperature in a wind tunnel can greatly improve the R&D efficiency of automotive R&D engineers. It is not necessary to do low temperature tests for summer or high temperature tests in winter.
Second, the sun simulation
Every day, the sun exposure of a car is different, even at every moment, such as dark clouds, tunnels, etc. So how does this function work in the wind tunnel?
A solar simulation system for simulating daylight conditions is placed at the top of the vehicle test section in the wind tunnel. The system is generally divided into two categories according to the form, one is fixed at the top of the test section, that is, the overhead type; the other is by installing a set of curved bracket system, that is, dome type.
Top-mounted
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