Experimental and Numerical investigation of ice uniformity with spoiler in the icing enviromental test

The main aim of this study was to reveal the influence of spoiler on thickness uniformity of ice layer in environmental test chamber by experiments and numeric, while analyse the effects of variable fan speed and temperature on the results parameters. The results parameters were ice thickness and ice shape. The second aim was to study the effect of different droplet sizes on ice shape. The results revealed that the droplet size had effects on the ice shape, and the spoiler had strong effects on the ice uniformity: (1) The spoiler could significantly affected the trajectory of the droplets by disturbing the air flow, and then improved the ice thickness uniformity; (2) Increasing the fan speed could effectively increase the ice thickness in a limited time; (3) The droplet size had a direct impact on the ice shapes, and different droplet sizes would result in different ice shapes; (4) Temperature also has an important impact on the ice shape, and account for the formation of different ice shapes, the dual effects of temperature and droplet size should be considered comprehensively. The experience results provide the theoretical and engineering technical bases and prevents the occurrence of owe experiment in the atmospheric icing laboratory.