华龙一号蒸汽发生器流致振动关键技术研究及应用

Key Technology Research and Application of Flow-Induced Vibration in HPR1000 Steam Generator

在理论建模和实验研究的基础上,提出了两相流激振力无量纲归一化的方法,构建了更为精确的两相流激振力功率谱密度包络谱。引入界面流速和滑速比等两相流参数,建立了一种两相流流弹失稳数学模型,形成了先进的两相流中管束结构流弹失稳评估方法。基于流体力与管束漩涡脱落相耦合的振动机理,创建了更能反映流体力与管子振动耦合的新尾流振子模型,提出了三维弹性管漩涡脱落诱发振动的快速预测方法。研发了完备的蒸汽发生器流致振动评价软件,为流致振动分析和评价提供了有效的分析工具,形成了高效的流致振动关键技术工程应用体系。

Based on theoretical modeling and experimental research,a dimensionless normalization method of two-phase flow excitation force is proposed,and a more accurate power spectral density envelope spectrum of two-phase flow excitation force is constructed.Two-phase flow parameters such as interface flow velocity and slip ratio are introduced,and a mathematical model of flow-elastic instability is established for two-phase flow,and an advanced evaluation method for flow-elastic instability of tube bundle structure in two-phase flow is established.Based on the vibration mechanism coupled with fluid force and tube bundle vortex shedding,a new wake oscillator model which can better reflect the coupling between fluid force and tube vibration is created,and a fast prediction method for three-dimensional elastic tube vortex shedding induced vibration is proposed.Steam generator FIV software is developed,to provide an effective analytic tool for FIV analysis and evaluation,and thus form an efficient engineering application system for key technologies of FIV.