| DOI | Resolve DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2021.121660 |
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| Author | Search for: Liu, Guanghai; Search for: Liu, Yuying; Search for: Liu, Fengshan1; Search for: Consalvi, Jean-Louis; Search for: Xu, Jiale |
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| Affiliation | - National Research Council of Canada. Metrology Research Centre
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| Funder | Search for: National Natural Science Foundation of China; Search for: Overseas Expertise Introduction Project for Discipline Innovation; Search for: Higher Education Discipline Innovation Project |
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| Format | Text, Article |
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| Physical description | 15 p. |
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| Subject | radiative heat transfer; full-spectrum correlated k-distribution; nongray-wall |
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| Abstract | 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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| Publication date | 2021-07-22 |
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| Publisher | Elsevier |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | S0017931021007638 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 4773b33f-425d-4f06-a002-1058f2094cd5 |
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| Record created | 2022-08-25 |
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| Record modified | 2022-08-25 |
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