【摘要】 为了探究波形板分离器的装配偏差诱使蒸汽发生器流动特性发生波动的物理机理，采用将三维数值模拟与一维流阻模型相耦合的数值模拟方法，搭建了蒸汽发生器内部流动全尺寸解析数值仿真平台，量化了波形板间距以及装配倾斜角对蒸汽发生器通流特性的影响规律。研究结果表明：通过改变波形板间距调节通流面积来调控整体阻力，3 mm间距相较于7 mm基准工况导致速度增量提升至2倍、压损增加至4倍；倾斜角变化主要引起局部流动分离，但对全局压损的影响不显著(影响幅度小于5%);限流器的流场整流作用使波形板局部阻力变化以1.74倍的传递系数被放大为系统压损，这种非线性放大效应揭示了波形板分离器的装配偏差对蒸汽发生器流动不确定性具有显著影响。更多还原

【Abstract】 To explore the physical mechanism behind the fluctuations in the flow characteristics of steam generators induced by the assembly deviations of corrugated plate separators, a numerical simulation method coupling three-dimensional(3D) numerical simulation with a one-dimensional(1D) flow resistance model was employed, a full-scale analytical numerical simulation platform for internal flow in steam generators was constructed, and the influence laws of corrugated plate spacing and assembly inclination angle on the flow-through characteristics of steam generators were quantified. The research results show that the overall resistance is regulated by changing the spacing between corrugated plates and adjusting the flow-through area. Compared with the reference condition of 7 mm spacing, a spacing of 3 mm leads to a twofold increase in velocity and a fourfold increase in pressure loss. Changes in the inclination angle mainly cause local flow separation without significantly altering the global pressure loss under an influence amplitude of less than 5%. The flow field rectification effect of the restrictor amplifies the local resistance changes of the corrugated plates to system pressure loss with a transmission coefficient of 1.74. This nonlinear amplification effect reveals the significant impact of assembly deviations of corrugated plate separators on the flow uncertainty of steam generators.更多还原