Abstract
Researchers have focused in the last five years on modelling the aircraft ground deicing process using CFD (computational fluid dynamics) in order to reduce its costs and pollution. As preliminary efforts, those studies did not model the ice melting nor the diffusion between deicing fluids and water resulting from the melting process. This paper proposes a CFD method to simulate this process filling these gaps. A particulate two-phase flow approach is used to model the spray impact on ice near the contaminated surface. Ice melting is modelled using an extended version of the enthalpy-porosity technique. The water resulting from the melting process is diffused into the deicing fluid forming a single-phase film. This paper presents a new model of the process. The model is verified and validated through three steps. (i) verification of the species transport. (ii) validation of the transient temperature field of a mixture. (iii) validation of the convective heat transfer of an impinging spray. The permeability coefficient of the enthalpy-porosity technique is then calibrated. The proposed model proved to be a suitable candidate for a parametric study of the aircraft ground deicing process. On the validation test cases, the precision of heat transfer prediction exceeds 88%. The model has the ability of predicting the deicing time and the deicing fluid quantities needed to decontaminate a surface.
Highlights
The aircraft ground deicing process used at most airports is carried out using an impinging spray
A new OpenFOAM-V6 based solver (AGDEulerFoam) was developed for simulating a dispersed two-phase flow enabling the definition of the phases as a mixture of multiple species with different thermophysical properties
Developments achieved in this study are part of a design methodology for a numerical bench test of the aircraft ground deicing process in order to improve its efficiency
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The liquid/solid volume fraction is updated at each time-step, according to the energy transfer and a threshold temperature In this method, a single region is sufficient, a static mesh is used, which makes it more interesting in the AGD process. The second region relatively thin, is defined for the spray impingement on the ice. The multiphase flow in Fluids 2021, 6, 210 this region is carried out with a Eulerian-Eulerian model based on [22] works coupled to the enthalpy-porosity technique to model ice melting. The original version of the enthalpy-porosity technique is designed for a liquid-solid system It is widely used in internal flow simulations, in the context of Phase-Change Material (PCM) for heat storage. The third section presents a sequence of three test cases for the V&V assessment which followed by a calibration of the solidification/melting model
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