核蒸汽轮机再热器的再热源为饱和蒸汽、湿蒸汽，在管内流动过程中，两相流流型、换热系数均不断变化，以往的再热器动态数学模型未考虑这些变化。本文的研究充分地考虑了这些影响，提出了再热器分布参数建模方法，建立的模型更能反映物理实质 The reheat of the nuclear steam turbine reheater is saturated steam and wet steam. The flow pattern and heat transfer coefficient of the two-phase flow are constantly changing during the flow in the pipe. The past reheater dynamic mathematical model does not take these changes into account. The research in this paper fully considers these effects and proposes a method for modeling reheater distribution parameters. The established model can better reflect the physical substance