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An experimental investigation into ignition and combustion of groups of slurry fuel droplets containing high concentrations of water
Fuel Processing Technology ( IF 7.2 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.fuproc.2020.106553
T.R. Valiullin , K.Yu. Vershinina , G.V. Kuznetsov , P.A. Strizhak

Abstract In this study, the main ignition and combustion characteristics have been compared for droplet groups of a coal-water slurry containing petrochemicals (CWSP), as well as oil, surrounded by water droplets. Thus, in a combustion chamber, we simulated the ignition and combustion conditions of a heterogeneous fuel aerosol that can be formed when jets of different liquids cross or when multi-component flows delaminate. It was shown that a decrease in the distance between droplets (from 10 mm to 2 mm, i.e. to the typical fuel droplet size) reduces the gas-phase and heterogeneous ignition delay times of oil and CWSP by 30% on average. The evaporation times of water droplets decrease by approximately 25%, if the distance between them increases in the combustion chamber. It was established that the ignition delay times of oil and coal-water slurry containing petrochemicals increased by 20–40% and 40–70%, respectively, when a combustible liquid droplet was in the center with six water droplets around it. The experimental results are a database for the development of efficient technologies of injecting multi-component fuel into combustion chambers.

中文翻译:

含高浓度水的浆状燃料液滴组点火和燃烧的实验研究

摘要 在这项研究中,比较了水滴包围的含有石化产品 (CWSP) 和油的水煤浆液滴群的主要点火和燃烧特性。因此,在燃烧室中,我们模拟了异质燃料气溶胶的点火和燃烧条件,当不同液体的射流交叉或多组分流分层时可以形成这种气溶胶。结果表明,液滴之间距离的减小(从 10 毫米到 2 毫米,即典型的燃料液滴尺寸)可将油和 CWSP 的气相和非均相点火延迟时间平均减少 30%。如果在燃烧室中水滴之间的距离增加,水滴的蒸发时间会减少约 25%。研究表明,当可燃液滴在中心,周围有六个水滴时,含有石化产品的油和水煤浆的点火延迟时间分别增加了 20-40% 和 40-70%。实验结果是开发将多组分燃料注入燃烧室的有效技术的数据库。
更新日期:2020-12-01
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