提出了一种简单的,唯象地确定的热传导模型以用于强功率加热下的L-模和H-模的约束分析。如假定中心热导率与中心等离子体温度成正比,则所得能量约束时间将自动与外加热功率的平方根的倒数成正比。讨论了锯齿效应、边缘H-模效应及中心热垒效应。用该模型来讨论氘、氚燃烧过程中的等离子体约束性能,其结果将比通常应用的零维等值线分析法(POPCon)得到的大为改进。 A simple and phenomenally determined heat conduction model is proposed for the constraint analysis of L-mode and H-mode under intense power heating. Assuming that the central thermal conductivity is proportional to the central plasma temperature, the resulting energy confinement time will automatically be proportional to the reciprocal of the square root of the external heating power. The saw-tooth effect, the edge H-mode effect and the center thermal barrier effect are discussed. This model is used to discuss the plasma confinement properties of deuterium and tritium combustion and the results will be significantly improved over the commonly used zero-dimensional contour analysis (POPCon).