The CWT-1 is used to investigate the behavior of coatings in terms of anti-sticking and cleanability properties.
By means of a customized venturi pump, fruit flies (Drosophila melanogaster) are injected in the wind tunnel.
The coated samples are installed on a reusable cylinder located in the aft part of the test section, at 1.2 meters from the insect injection.
A high-speed camera, operated at a sampling frequency of 20000 Hz, verifies the distribution of the insects, their speed in the test section and their impact behavior on the samples.
After insect injection, water droplets (LWC = 0,25g/m³; MVD = 15µm) are injected during two minutes at a start temperature of 20°C to investigate the cleanability of the coating.
The surface of the coating is scanned before and after cleaning in order to measure height and area of the insect residues and amount of blockage of the holes in the case of a micro-perforated substrate.