基于节点法的轴流式预热蒸汽发生器稳态热工水力分析

基于一维流动假设、传热假设和两相热平衡假设等，采用集总参数法和分布参数法相结合，建立了轴流式预热蒸汽发生器的一维稳态热工水力分析模型。采用C++语言编程，将计算结果与某典型轴流式预热蒸汽发生器热工水力参数的设计值进行对比，结果表明大部分总体参数计算结果的相对误差都在3%以内，验证了模型的合理性；蒸汽发生器中温度、空泡份额、压力等参数沿一次测流体流动方向的变化趋势，符合热工水力学及定性机理分析结果，说明所建立的模型和求解方法能够较准确预测轴流式预热蒸汽发生器稳态热工水力参数分布。 

Steady-State Thermal-Hydraulic Analysis of Steam Generator with Axial Economizer Based on Node Method

Based on the one-dimensional flow hypothesis, heat transfer hypothesis, and two-phase thermal equilibrium hypothesis, a lumped parameter method and a distributed parameter method are used to establish a one-dimensional steady-state thermal-hydraulic analysis model of the steam generator with axial economizer. Using C++ language programming, the calculation results are compared with the design values of the thermal-hydraulic parameters of a typical steam generator with axial economizer. The results show that the relative error of most of the overall parameter calculation results is within 3%, which verifies the rationality of the model. The analysis of the temperature, cavitation share, pressure and other parameters of the steam generator along the direction of the measured fluid flow trend consist well with the results of thermal hydraulics and qualitative mechanism analysis, indicating that the model and solution method established in this paper can accurately predict the steady-state thermal hydraulic parameter distribution of the steam generator with axial economizer.