{"title":"超临界压力下碳氢化合物燃料多孔焦化中的湍流传热机理分析","authors":"Mingyin Zhu, Huaizhi Han, Zhongxiu Xu","doi":"10.1021/acs.iecr.4c01840","DOIUrl":null,"url":null,"abstract":"The effect of carbon deposits based on the porous properties in aero-engine cooling channels on turbulent heat transfer is numerically studied. As such, a CFD coupling model combining fuel pyrolysis and porous media model is established. The comparison results between the porous and solid coking that porous coking has a higher heat transfer efficiency than solid coking. At δ<sub>c</sub> = 60 μm, the total heat transfer coefficient (THTC) of porous coking is 98 W m<sup>–2</sup> K<sup>–1</sup> higher than that of solid coking. Considering the effect of porosity on porous coking, it could be seen that the THTC of porous coking first increases and then decreases with the increase of porosity. The critical porosity finds around 39.0%. Finally, the influence of spatial inhomogeneity of coking morphology is studied. It was indicated that the THTC for porous coking with inhomogeneous porosity is higher than the arithmetic mean of the homogeneous porosity. Inhomogeneity porosity porous coking with 6 and 72% porosity is 39 W m<sup>–2</sup> K<sup>–1</sup> higher than the arithmetic mean of homogeneous porosity.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mechanism Analysis of Turbulent Heat Transfer in Porous Coking of Hydrocarbon Fuels under Supercritical Pressure\",\"authors\":\"Mingyin Zhu, Huaizhi Han, Zhongxiu Xu\",\"doi\":\"10.1021/acs.iecr.4c01840\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The effect of carbon deposits based on the porous properties in aero-engine cooling channels on turbulent heat transfer is numerically studied. As such, a CFD coupling model combining fuel pyrolysis and porous media model is established. The comparison results between the porous and solid coking that porous coking has a higher heat transfer efficiency than solid coking. At δ<sub>c</sub> = 60 μm, the total heat transfer coefficient (THTC) of porous coking is 98 W m<sup>–2</sup> K<sup>–1</sup> higher than that of solid coking. Considering the effect of porosity on porous coking, it could be seen that the THTC of porous coking first increases and then decreases with the increase of porosity. The critical porosity finds around 39.0%. Finally, the influence of spatial inhomogeneity of coking morphology is studied. It was indicated that the THTC for porous coking with inhomogeneous porosity is higher than the arithmetic mean of the homogeneous porosity. Inhomogeneity porosity porous coking with 6 and 72% porosity is 39 W m<sup>–2</sup> K<sup>–1</sup> higher than the arithmetic mean of homogeneous porosity.\",\"PeriodicalId\":39,\"journal\":{\"name\":\"Industrial & Engineering Chemistry Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Industrial & Engineering Chemistry Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1021/acs.iecr.4c01840\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial & Engineering Chemistry Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1021/acs.iecr.4c01840","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Mechanism Analysis of Turbulent Heat Transfer in Porous Coking of Hydrocarbon Fuels under Supercritical Pressure
The effect of carbon deposits based on the porous properties in aero-engine cooling channels on turbulent heat transfer is numerically studied. As such, a CFD coupling model combining fuel pyrolysis and porous media model is established. The comparison results between the porous and solid coking that porous coking has a higher heat transfer efficiency than solid coking. At δc = 60 μm, the total heat transfer coefficient (THTC) of porous coking is 98 W m–2 K–1 higher than that of solid coking. Considering the effect of porosity on porous coking, it could be seen that the THTC of porous coking first increases and then decreases with the increase of porosity. The critical porosity finds around 39.0%. Finally, the influence of spatial inhomogeneity of coking morphology is studied. It was indicated that the THTC for porous coking with inhomogeneous porosity is higher than the arithmetic mean of the homogeneous porosity. Inhomogeneity porosity porous coking with 6 and 72% porosity is 39 W m–2 K–1 higher than the arithmetic mean of homogeneous porosity.
期刊介绍：
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
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