沸腾两相流动中的动力学特征量

Dynamics parameters in boiling two-phase flow

采用频域和相空间方法分析沸腾两相流系统。用实测的声压信号重构相空间 ,并用最大 Lyapunov数和相关维数对重构的相空间进行量化。分析这些量化参数与实际实验过程中观察到的流型变化之间的关系。结果表明 :声压信号的功率谱和相空间的量化参数均与沸腾流体中的流型变化有关 。

Spectrum analysis and phase method were used for the boiling two phase flow studying in this paper. Maximum Lyapunov exponent and correlation dimension are used to quantify phase space that is reconstructed from time series of pressure signal. The correlation between those quantifying characteristic parameters and flow patterns was analyzed. Results indicate that this correlation may provid an useful parameter to determine the flow pattern.