This paper discusses a fundamental study on icing phenomena in a high-temperature environment. Generally, ice accretion is a phenomenon to form ice layer on a body due to impingement of super-cooled water droplets. In recent years, it is known that ice accretion occurs in the engine core such as the low pressure compressor and the first stage of the high pressure compressor, where the temperature is about 30 degree C. The ice accretion in the engine core is called as "ice crystal accretion". Some scenarios are given for the ice crystal accretion, but the mechanism has not been sufficiently clarified yet. Moreover, the current icing model is not available in the environment where the temperature is above the freezing point. In this paper, we develop a new icing code which is applicable to a warm environment. The new icing model consists of four iterative computations for turbulent flow, droplet/ice trajectory, thermodynamics of icing, and heat conduction within a wall. First, we validate our new icing model with a flat plate instead of a compressor stator blade as the fundamental study of ice crystal accretion. Then, we simulate ice accretion on a two-dimensional compressor stator blade in a high-temperature environment, in order to clarify the ice-crystal physics.
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