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Mathematical modeling of heat transfer in a droplet of coal-water fuel leading to its fragmentation
Applied Thermal Engineering ( IF 6.1 ) Pub Date : 2022-05-10 , DOI: 10.1016/j.applthermaleng.2022.118628 D.V. Antonov 1 , G.V. Kuznetsov 1 , P.A. Strizhak 1
Applied Thermal Engineering ( IF 6.1 ) Pub Date : 2022-05-10 , DOI: 10.1016/j.applthermaleng.2022.118628 D.V. Antonov 1 , G.V. Kuznetsov 1 , P.A. Strizhak 1
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Based on the results of the experimental studies performed, physical and mathematical models were developed to describe the processes of heat transfer in droplets of potential coal-water fuels (CWF) before their fragmentation caused by intense heating. The model is based on the solution of a system of heat transfer equations taking into account specific features of the CWF droplets fragmentation identified in the course of experiments. CWF droplet fragmentation delay times were recorded in the course of heating using the disintegration criterion identified in the experiments performed. In the case of CWF, complete evaporation of water from fuel composition droplet serves as the criterion. A series of experiments were carried out to test the model and to clarify the mechanism for implementing the processes investigated. The effect of a group of the following factors on the fragmentation delay times was determined: the temperature (773–2273 K), the initial droplet sizes (0.05–1.55 mm) and the component composition of the fuel (solid particles concentration varied between 40 and 60 wt%). The conditions for the intensification of the processes of fragmentation and ignition of potential fuel suspensions were singled out.
中文翻译：
导致煤水燃料液滴碎裂的传热的数学建模
根据所进行的实验研究的结果，开发了物理和数学模型来描述潜在煤水燃料 （CWF） 液滴在因强烈加热而碎裂之前的传热过程。该模型基于传热方程组的解，同时考虑了实验过程中发现的 CWF 液滴碎裂的具体特征。使用所进行实验中确定的崩解标准在加热过程中记录 CWF 液滴碎裂延迟时间。在 CWF 的情况下，燃料成分液滴中的水分完全蒸发是标准。进行了一系列实验来测试模型并阐明实施所研究过程的机制。确定了以下一组因素对碎裂延迟时间的影响：温度 （773-2273 K）、初始液滴大小 （0.05-1.55 mm） 和燃料的成分组成（固体颗粒浓度在 40 到 60 wt% 之间变化）。挑出了潜在燃料悬架的碎裂和点火过程加剧的条件。
更新日期：2022-05-10
中文翻译：
导致煤水燃料液滴碎裂的传热的数学建模
根据所进行的实验研究的结果，开发了物理和数学模型来描述潜在煤水燃料 （CWF） 液滴在因强烈加热而碎裂之前的传热过程。该模型基于传热方程组的解，同时考虑了实验过程中发现的 CWF 液滴碎裂的具体特征。使用所进行实验中确定的崩解标准在加热过程中记录 CWF 液滴碎裂延迟时间。在 CWF 的情况下，燃料成分液滴中的水分完全蒸发是标准。进行了一系列实验来测试模型并阐明实施所研究过程的机制。确定了以下一组因素对碎裂延迟时间的影响：温度 （773-2273 K）、初始液滴大小 （0.05-1.55 mm） 和燃料的成分组成（固体颗粒浓度在 40 到 60 wt% 之间变化）。挑出了潜在燃料悬架的碎裂和点火过程加剧的条件。
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