Ice crystals are one of the important factors causing aircraft icing, and icing prediction is a major problem in the aviation field. The calculation of ice crystal trajectory is a precondition of the accurate simulation of ice accretion. In this paper, an ice crystal trajectory simulation method based on the Lagrangian method is proposed, and the effects of various parameters on the calculation results are discussed. Control equations of the ice crystal motion trajectory were established, and the solution methods of the equations are given. The method was used to calculate the ice crystal motion characteristics under various conditions, and the calculation results were compared with experimental results and reference results, to verify the correctness of the method. The effects of different particle densities, drag coefficient models, ice crystal diameters, inflow velocities, and angles of attack on the ice crystal collection coefficient were studied. The results showed that the smaller the particle density, the smaller the collection coefficient; the collection coefficient increases with the increase of ice crystal diameter and inflow velocity.
The ice crystal supercooled droplet mixed phase icing problem is an important research direction in aircraft icing and has received more attention in recent years. The thermodynamic process of the water film after the ice crystals impact on the surface determines the final ice shape, which is an important part of the accurate prediction of aircraft icing. In this paper, a thermodynamic model of ice crystal supercooled droplet mixed phase icing is proposed based on the extended Messinger model, according to the results of flow field and particle trajectory calculations. In this model, the mass and energy conservation equations of ice crystals, supercooled droplets, and liquid water are considered. The equations take the process of ice crystal adhesion and erosion into account, and the solution method of the equations is given. Ice shapes are calculated under various ice crystal supercooled droplet mixed phase conditions and compared with experimental results to demonstrate the validity of the numerical method. The effects of ice crystal erosion rate, melting ratio, and adhesion coefficient on the calculation results are analyzed by a numerical method. The results show that the ice crystal erosion rate has little effect on the ice shape, while a larger melting ratio and adhesion coefficient lead to more ice accretion.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.