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首页> 外文期刊>Journal of Mechanical Science and Technology >Fouling characteristics of MgO particles under subcooled flow boiling
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Fouling characteristics of MgO particles under subcooled flow boiling

机译：沸腾流沸腾下MgO颗粒的结垢特征

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摘要

In order to investigate the particulate fouling characteristics, experiments of water based magnesia particulate suspensions were carried out in an annular test section under subcooled flow boiling. The sizes of magnesia particles were 40 nm and 10 m, respectively. The influence of particle concentration, heat flux, mass flow rate and inlet temperature on fouling resistance were investigated, and the Chilton-Colburn analogy was applied to analyze the fouling process. The results show that the asymptotic value of fouling resistance increases with the increase of particle concentration. The asymptotic value of fouling resistance tends to fall when mass flow rate increases. As inlet temperature increases, there will be an obvious drop in the asymptotic value of fouling resistance. Regarding to heat flux, opposite variation trend was found between nano and micro-magnesia particles when changing the heat flux. Moreover, there is an obvious difference in asymptotical value of fouling resistance between nano-particles and micro-particles.
机译：为了研究颗粒污染特性，在过冷流量沸腾的环形试验部分中进行水基氧化镁颗粒悬浮液的实验。氧化镁颗粒的尺寸分别为40nm和10μm。研究了颗粒浓度，热通量，质量流量和入口温度对污垢抗性的影响，并应用了Chilton-Colburn类比来分析污垢过程。结果表明，随着颗粒浓度的增加，污垢抗性的渐近值增加。当质量流量增加时，污垢抗性的渐近值趋于下降。随着入口温度升高，污垢抗性的渐近值会有明显的下降。关于加热通量，在改变热通量时，纳米和微氧化镁颗粒之间发现相反的变异趋势。此外，纳米粒子和微粒之间的污垢抗性的渐近值存在明显差异。

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