Abstract In most designs, the coolant channel is under non-uniform heating, mainly one-sided heating. There is no clear understanding of the problem of unilateral heating. In order to deepen the understanding of the mechanism of CHF in the unilateral heating rectangular narrow channel, a three-fluid transient model of annular flow was developed for the rectangular narrow channel heated on one side. Basic conservation equations were established for the liquid film, droplets, and vapor core respectively, and the constitutive model involved void fraction, interphase friction, wall friction, and the calculation of entrainment rate and deposition rate. The finite difference method was used to solve the three-fluid transient model of annular flow numerically. Within a wide range of experimental parameters (pressure 0.1–15.0 MPa, mass flux 300.0–17100.0 kg/m2s, inlet subcooling 6.5–292.5 K, length of channel section 4.0–50.0 mm, width of channel section 2.0–6.35 mm, length of channel 200–1550 mm, and CHF value 0.63–28.4 MW/m2), most of the calculation error of the model were within 30%, which proved the validity of the three-fluid transient model of annular flow.

中文翻译：

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单边加热矩形窄通道临界热流模型

摘要 在大多数设计中，冷却液通道受热不均，主要是一侧受热。对单边加热的问题没有明确的认识。为加深对单边加热矩形窄通道CHF机理的理解，建立了单边加热矩形窄通道环流的三流体瞬态模型。分别建立了液膜、液滴和蒸气核的基本守恒方程，本构模型涉及空隙率、相间摩擦、壁面摩擦以及夹带速率和沉积速率的计算。采用有限差分法对环流三流体瞬态模型进行数值求解。在广泛的实验参数范围内（压力 0.1-15.0 MPa，质量通量 300.0-17100。