| DOI | Trouver le DOI : https://doi.org/10.1016/j.ijheatmasstransfer.2021.121660 |
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| Auteur | Rechercher : Liu, Guanghai; Rechercher : Liu, Yuying; Rechercher : Liu, Fengshan1; Rechercher : Consalvi, Jean-Louis; Rechercher : Xu, Jiale |
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| Affiliation | - Conseil national de recherches du Canada. Centre de recherche en métrologie
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| Bailleur de fonds | Rechercher : National Natural Science Foundation of China; Rechercher : Overseas Expertise Introduction Project for Discipline Innovation; Rechercher : Higher Education Discipline Innovation Project |
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| Format | Texte, Article |
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| Description physique | 15 p. |
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| Sujet | radiative heat transfer; full-spectrum correlated k-distribution; nongray-wall |
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| Résumé | The walls of high-temperature combustion devices are usually assumed to be black or gray in radiative heat transfer calculations to save computing resources; however, this simplification may introduce large errors. To improve the accuracy of the Full-Spectrum Correlated K-distribution (FSCK) method in calculations of nongray-wall radiative heat transfer problems without reducing the computational efficiency, a nongray-wall emissivity model for the FSCK method is proposed based on uniform-medium assumption. The accuracy of this nongray-wall emissivity model and the commonly used Planck-function-weighted gray-wall emissivity model is evaluated in 1D isothermal and homogeneous cases, 1D non-isothermal and inhomogeneous cases, and 3D flames bounded by walls coated with fly-ash deposit or soot deposit. The results show that the nongray-wall emissivity model for FSCK demonstrates much better accuracy than the gray-wall one, especially for cases of low wall temperatures. The nongray-wall emissivity model provides good accuracy over a wide range of optical depth, while the accuracy of the gray-wall emissivity model is highly dependent on the optical depth. The nongray-wall emissivity model based on the uniform-medium assumption can be applied to non-isothermal and inhomogeneous radiative heat transfer problems involving nongray walls. |
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| Date de publication | 2021-07-22 |
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| Maison d’édition | Elsevier |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Identificateur | S0017931021007638 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 4773b33f-425d-4f06-a002-1058f2094cd5 |
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| Enregistrement créé | 2022-08-25 |
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| Enregistrement modifié | 2022-08-25 |
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