CPR1000蒸汽发生器二次侧三维稳态热工水力分析

Three-dimensional Steady State Thermal-hydraulic Analysis of Secondary Side for CPR1000 Steam Generator

采用三维稳态分析软件GENEPI,对CPR1000蒸汽发生器二次侧管束区进行了热工水力计算,利用多孔介质及局部阻力系数来表征传热管及各几何部件的复杂结构和压降影响,得到了二次侧管束区流场、温度场等的分布情况。计算结果表明:管束区最大干度为0.3;将典型传热管的动能数据提供给流致振动软件进行计算分析,结果显示在本工况下,传热管的流致振动在可接受范围内;对管板附近的流场及温度场进行分析,预测了此模型及工况下的泥渣沉积区域,为排污管的设计提供了输入数据。计算结果验证了CPR1000蒸汽发生器二次侧管束区设计的合理性。

A three-dimensional steady state analysis software GENEPI was used to do the thermal-hydraulic analysis of tube bundle region for secondary side of CPR1000 steam generator.The porous medium model and local pressure-drop model were used in GENEPI to represent the tubes and pressure-drop of the complex geometry.The flow and temperature fields of the tube bundle in secondary side were analyzed and the highest steam quality in the tube bundle is 0.3.The kinetic energy of typical tubes was acquired by a computer code as the input for the flow-induced vibration analysis.The result shows that the flow-induced vibration in heat transfer tubes is acceptable.At the same time,the flow and temperature fields near the tube sheet were analyzed and the fouling deposit region was predicted based on such a model and working condition.The result can be used as the input for the design of draining pipe.The calculation resultsverify the rationality for the design of the CPR1000 steam generator secondary side tube bundle region.