The distribution of airfoil anti-icing heat load in supercooled large droplet condition is calculated. The methods based on computational fluid dynamics theory are given to simulate droplet collection efficiency and anti-icing heat load. The semi-empirical formula is used to solve the drag coefficient in process of large droplets movement. Physical phenomenon such as droplet breakup, splashing and rebound are judged by Weber number and splashing parameter. Adopting the Messinger method, the mass and energy equations of control volume are analyzed and the distribution of anti-icing heat load on impacted surface is simulated. According to the calculation results, the influence of different droplet diameters on the heat load distribution is analyzed. The results show that airfoil heat load will increase in SLD conditions compared to the normal droplet conditions. With the increase of droplet diameter, the heat load distribution is stabilized gradually. It will provide a reference for the anti-ice system design.
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