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首页> 外文期刊>Simulation modelling practice and theory: International journal of the Federation of European Simulation Societies >Dynamic simulation of natural circulation steam generators with the use of finite-volume-algorithms - A comparison of four algorithms
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Dynamic simulation of natural circulation steam generators with the use of finite-volume-algorithms - A comparison of four algorithms

机译：使用有限体积算法的自然循环蒸汽发生器动态仿真-四种算法的比较

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摘要

The paper reports the results of a comparison of the four finite-volume-algorithms SIMPLE, SIMPLEC, SIMPLER and PISO. The analysis has been done to explore and compare the suitability of the algorithms for the dynamic simulation of natural circulation steam generators based on a so called tube-header-model. The suitability of the algorithms was tested with the results of two simulation examples - a heat recovery steam generator with a horizontal tube bank (Fig. 3a) and a two-drum steam generator with a vertical tube bank (Fig. 3b). The calculations are done at low system pressure and under hot start-up conditions for the boilers. The results of the computations demonstrate that the SIMPLER algorithm should be preferred for dynamic simulations which are based on the tube-header-model. The algorithm shows a high stability, an extended field of variability of the under-relaxation factors as well as small required under-relaxation. The strong dependence of the calculation time on the number of control volumes is the only unfavourable characteristic of the SIMPLER algorithm.
机译：该论文报告了SIMPLE，SIMPLEC，SIMPLER和PISO四个有限体积算法的比较结果。已经进行了分析，以探索和比较基于所谓的管头模型的自然循环蒸汽发生器动态仿真算法的适用性。通过两个模拟示例的结果测试了算法的适用性-具有水平管束的热回收蒸汽发生器（图3a）和具有垂直管束的两鼓式蒸汽发生器（图3b）。计算是在低系统压力和锅炉热启动条件下进行的。计算结果表明，对于基于管头模型的动态仿真，SIMPLER算法应该是首选。该算法显示出高稳定性，欠松弛因子的可变性的扩展域以及所需的较小的松弛因子。计算时间对控制量数量的强烈依赖性是SIMPLER算法的唯一不利特征。

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