Abstract:

Temperature oscillation signal of pulsating heat pipes was studied quantitatively and qualitatively by means of analyses of power spectrum, auto-correlation function, correlation dimension, Kolmogorov entropy and rescaled range statistical analysisThe results showed that the system had deterministic chaotic characteristics which featured non-integer value of correlation dimension about 2.5—11 and positive Kolmogorov entropyMost Hurst exponents were between 0.8 and 1, indicating long range correlationThermal performance was tied with correlation dimension.Higher correlation dimension indicated lower thermal resistance.

Key words:

脉冲热管, 传热性能, 混沌, 关联维

摘要： 运用功率谱分析、自相关分析、关联维数和K熵、R/S分析等线性和非线性分析技术对以FC-72和水为工质的脉冲热管温度波动信号进行了定性和定量研究．研究表明：波动信号具有确定性混沌特性，其重构的动力学系统具有非整数值的关联维，范围在2.5~11之间，K熵为有限正值。Hurst指数在0.8~1之间，表明温度波动信号有强烈的长程相关性。传热特性和关联维之间有密切的联系，热阻越小时关联维数越大。

关键词:

脉冲热管, 传热性能, 混沌, 关联维