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Multi-Zone Ice Accretion and Roughness Models for Aircraft Icing Numerical Simulation

Part of: Thermodynamics and heat transfer Two-phase and multiphase flows

Published online by Cambridge University Press:  08 July 2016

Chengxiang Zhu ,
Chunling Zhu  and
Tao Guo
Chengxiang Zhu*
Affiliation:
Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Chunling Zhu*
Affiliation:
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Tao Guo*
Affiliation:
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
*
*Corresponding author. Email:[email protected] (C. X. Zhu), [email protected] (C. L. Zhu), [email protected] (T. Guo)
*Corresponding author. Email:[email protected] (C. X. Zhu), [email protected] (C. L. Zhu), [email protected] (T. Guo)
*Corresponding author. Email:[email protected] (C. X. Zhu), [email protected] (C. L. Zhu), [email protected] (T. Guo)
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Abstract

A mathematical multi-zone ice accretion model used in the numerical simulation of icing on airfoil surface based on three water states, namely, continuous film, rivulets and beads is studied in this paper. An improved multi-zone roughness model is proposed. According to the flow state of liquid water and film flow, rivulets flow governing equations are established to calculate film mass distribution, film velocity, rivulet wetness factor and rivulet mass distribution. Force equilibrium equations of droplet are used to establish the critical conditions of water film broken into rivulets and rivulets broken into beads. The temperature conduction inside the water layer and ice layer is considered. Using the proposed model ice accretion on a NACA0012 airfoil profile with a 4° angle of attack under different icing conditions is simulated. Different ice shapes like glaze ice, mixed ice and rime ice are obtained, and the results agree well with icing wind tunnel experiment data. It can be seen that, water films are formed on the surface, and heights of the films vary with icing time and locations. This results in spatially-temporally varying surface roughness and heat transfer process, ultimately affects the ice prediction. Model simulations indicate that the process of water film formation and evolution cannot be ignored, especially under glaze ice condition.

Keywords

Ice accretion modelmulti-zonefilmrivuletsbeadsroughness heightheat transfertemperature conduction

MSC classification

Secondary: 76T10: Liquid-gas two-phase flows, bubbly flows 80A20: Heat and mass transfer, heat flow
Type
Research Article
Information
Advances in Applied Mathematics and Mechanics , Volume 8 , Issue 5 , October 2016 , pp. 737 - 756
Copyright
Copyright © Global-Science Press 2016 

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