Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
Ice crystal icing is a phenomenon where ice particles are ingested into a jet engine, potentially forming a layer of ice in the compressor. It can lead to engine power loss, though the mechanisms behind ice crystal icing are not yet fully understood. Therefore, modeling of ice crystal icing remains an urgent issue. Recent experiments on ice crystal icing have revealed phenomena such as sticking, bouncing, and erosion of ice particles under various conditions. While ice crystal icing models incorporating the effects of sticking and bouncing have been developed in recent years, there are only a limited number of models that account for ice erosion. This study introduces a novel ice crystal icing model that incorporates an ice erosion. The icing simulation consists of four steps: flow field computation, ice particle trajectory computation, thermodynamic computation, and grid modification. The proposed ice erosion model was derived from a semi-empirical model employed in predicting sand erosion based on classic solid/solid collision theory and was integrated into the thermodynamic model. The parameters for this semi-empirical model were selected based on the impacts of ice particles on the ice layer. Numerical simulations of ice crystal icing were conducted under various conditions using the ice erosion model. The results revealed a significant discrepancy in the predicted icing shape depending on the presence or absence of the erosion model. In addition, the model was also validated through comparison with experimental data.
