Puffing/Micro-explosion in Composite Mono-and Multi-component Droplets: Experimental Results and Modelling

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI:10.11159/csp21.lx.303

R. Fedorenko, D. Antonov, P. Strizhak, E. Shchepakina, V. Sobolev, S. Sazhin

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引用次数: 1

Abstract

Extended Abstract The results of recent experimental studies of puffing and micro-explosion and modelling approaches to their analysis are summarised. In [1] the analysis was focused on non-mixed and premixed Diesel fuel/water and rapeseed oil/water droplets. Air temperature was in the range 850–1100°C, and initial droplet radii were in the range 0.62–1.34 mm. It was shown that the time to puffing/micro-explosion decreases with increasing temperature, is weakly dependent upon the volume fraction of fuel, and increases with increasing droplet sizes. The analysis described in [2] focused on detailed experimental investigation of puffing and micro-explosions in composite water/rapeseed oil droplets in the presence of lignite and bituminous coal micro-particles in water. Droplets with radii in the range 1–2 mm were placed in a hot chamber with air velocities 3–7 m/s and temperatures up to 600°C. The time to puffing/micro-explosion and average radii of child droplets generated during puffing and micro-explosions were shown to decrease with increasing gas temperature. The above-mentioned experimental results

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单组分和多组分复合液滴的膨化/微爆炸:实验结果和模型

摘要综述了近年来膨化和微爆炸的实验研究结果以及对其进行分析的建模方法。在[1]中，分析的重点是未混合和预混柴油/水和菜籽油/水滴。空气温度为850 ~ 1100℃，初始液滴半径为0.62 ~ 1.34 mm。结果表明，膨化/微爆炸时间随温度的升高而减小，与燃料体积分数的关系较弱，随液滴尺寸的增大而增大。[2]中的分析侧重于在水中存在褐煤和烟煤微颗粒时复合水/菜籽油滴的膨化和微爆炸的详细实验研究。半径在1-2毫米范围内的液滴被放置在风速为3-7米/秒、温度高达600°C的热室中。随着气体温度的升高，膨化/微爆炸的时间以及膨化和微爆炸过程中产生的子液滴的平均半径减小。上述实验结果

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Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer

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