|Author:||Lam, Ka Wai|
|Title:||Numerical study of ice accretion on airfoil|
Hong Kong Polytechnic University -- Dissertations
|Department:||Faculty of Engineering|
|Pages:||xii, 63 pages : color illustrations|
|Abstract:||In-flight icing still remains one of the safety issues to aircraft. Obtaining certification is a long and rigorous process which requires an effective and accurate numerical tool The growing of computer power makes the possibility to develop an effective rime ice accretion model by using finite volume method. OpenFOAM is used to create the ice accretion model. The air flow field is calculated by solving the RANS equation with PIMPLE algorithm which ables to handle the compressible viscous flow with turbulence model. Rough wall function is implemented to model the roughness effect due to ice accretion. A droplet motion solver is developed base on Eulerian approach with the ability to handle single or multiple droplet sizes. This approach is validated on a 2D cylinder and airfoil cases. Results show good agreement with corresponding experimental and numerical data. A rime ice thermodynamic model is developed and implemented base on mass and energy balance. Convective heat transfer coefficient is predicted with the use of Stanton number. Although some area shows over prediction, the general profile is aligned with literature. Individual source terms for both mass and energy balance are studied to show the developed model is functional. While the value is not perfect due to the over prediction of the heat transfer coefficient, the general profile for all the source terms are discussed which show reasonable response with their corresponding input parameters.|
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