Study on heat flow decay in vertical jet of aircraft deicing fluid based on phase field and realizable k-ε turbulence model

IF 5.1 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-02-22 DOI:10.1016/j.tsep.2025.103446

Miao Gong, Yuanhang Shen

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Abstract

To investigate the heat flow loss characteristics during aircraft idle deicing operations, a two-dimensional axisymmetric transient numerical model for the heat flow coupling of high-temperature vertical deicing jets is developed using the phase field model and the Realizable k-ε turbulence model. The accuracy of the model is validated through experiments. The study focuses on effects of the deicing fluid concentration and ambient temperature on jet velocity, temperature decay, Nu, and Pe. Results show that velocity fluctuation at the nozzle outlet is induced by high shear rates between the jet and the surrounding air. The temperature reduction process can be divided into three stages: rapid decay, slow decay, and intense heat exchange at the wall surface. Convective heat transfer dominates the rapid decay stage, while both thermal diffusion and convective heat transfer jointly influence the slow decay stage. In the wall impingement region, the peak value of Nu occurs after the stagnation point and gradually decreases as the jet spreads. Ambient temperature has the greatest influence on the jet temperature decay within the 0 < r/d < 17.33 region. In the far-field region where r/d > 17.33, the wall jet temperature is more significantly affected by the concentration of the deicing fluid. These findings provide theoretical supports for predicting the velocity and heat loss of aircraft deicing jets, help to optimize deicing process parameters, and improve operation safety.

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.