Reactor corrosion and plugging problems severely hinder commercial application of supercritical water oxidation. A transpiring wall reactor can overcome these two problems by forming a protective water film on the inner surface of a porous transpiring wall to isolate corrosive substances and inorganic salt. This work proposed water film coverage rate and inorganic salt concentration in water film as evaluation indexes of water film characteristics. A computational fluid dynamics model of a new transpiring wall reactor was built to explore the characteristics of water film under key operating parameter conditions by numerical simulation together with experiment validations. The results show that water film coverage rate raised either with transpiration intensity and transpiration water temperature increasing or with feedstock flow rate and feedstock preheating temperature decreasing. Inorganic salt concentration in water film declined as transpiration intensity and transpiration length increased. Two equations were proposed to guide the optimization of reactor operating parameters.

中文翻译：

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超临界水氧化的透热壁反应器的模拟：水膜特性

反应堆腐蚀和堵塞问题严重阻碍了超临界水氧化的商业应用。透水壁反应器可通过在多孔透水壁的内表面上形成保护性水膜以隔离腐蚀性物质和无机盐来克服这两个问题。提出水膜的覆盖率和水膜中无机盐的浓度作为水膜特性的评价指标。建立了新型透壁反应器的流体动力学计算模型，通过数值模拟和实验验证，探索了关键操作参数条件下水膜的特性。结果表明，随着蒸腾强度和蒸腾水温度的升高，或者随着给水流量和给料预热温度的降低，水膜的覆盖率提高。随着蒸腾强度和蒸腾长度的增加，水膜中无机盐的含量下降。提出了两个方程式来指导反应堆运行参数的优化。