THE MEASUREMENT OF THE ICE ADHESIVE FORCE FOR SURFACES OF DIFFERENT WETTABILITIES UNDER FREEZING RAIN

The ice adhesive force is one of the key technical indicators for the anti-icing application of biomimetic superhydrophobics in many engineering fields. A measurement scheme for determining the ice adhesive force in real time by using the resistance strain gauge sensors is proposed, based on the principle that the strain of the icing samples during the cooling process is constrained by the ice adhesion. Via the data acquisition, the signal conversion and the software processing of the strain signals, the real-time monitoring and display of the strain sensing voltage are achieved. The ice adhesive force on the surfaces of different wettabilities is determined from the strain sensing voltage variation and the stress analysis of the samples. The results demonstrate that the real-time identification of the icing/melting behaviors and the ice adhesive force on surfaces of different wettabilities under cryogenic freezing environment is achieved by this measurement method.