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针对闭合回路一维单相自然循环的特点，对回路流动的基本方程进行简化，得出稳态自然循环流量Ｇｓｔ与加热功率Ｑ的１／（ｍ ＋ １）次方成正比。用以水和氟立昂为工质的自然循环实验装置在不同运行工况下实验得到的结果表明，特征值ｍ 不是常数，它随回路结构、工质及运行工况变化，主要由回路结构及工质决定。
Aiming at the characteristics of one-dimensional single-phase natural circulation in a closed circuit, the basic equations of the loop flow are simplified, and the steady-state natural circulation flow rate Gst is proportional to the 1 / (m + 1) th power of the heating power Q. The experimental results of natural circulation experiment device using water and Freon as working medium show that the eigenvalue m is not constant and varies with the structure, working fluid and operating conditions of the loop, and is mainly composed of loop structure And working fluid decision.