核蒸汽轮机再热器的动态建模

Dynamic Model Research of Reheater in Nuclear Steam Turbine

核蒸汽轮机动态建模时,为了使再热器的动态数学模型比较全面、合理,必须准确地计算管外循环蒸汽、管内加热蒸汽和金属管壁三者之间的换热量。采用分布参数方法建立了再热器动态数学模型,并进行了算例计算。结果表明所建立的动态数学模型较以往更加全面、合理。

In dynamic model of nuclear steam turbine, the dynamic model of reheater should be built in dis-tributed parameters according to three links, namely steam inside tubes, steam outside tubes and metal tubes. Inthis way, the dynamic model of reheater can be more reasonable and detailed, the heat transfer among the abovethree links can also be calculated more exactly. An example is performed by means of the dynamic model in thispaper, and the result shows that this dynamic model is more reasonable and detailed.