Subcooled boiling regime recognition based on fractal characteristic quantities of sound pres- sure

摘要

Based on acquisition of sound pressure in subcooled boiling two-phase system and through dynamic data processing methods, the dynamical behavior of the system is discussed. With the introduction of fractal concept, an analysis to the fractal feature of sound pressure signal is carried out. Moreover, the pseudo phase diagrams of typical time series of sound pressure are given. Finally, through dynamic clustering and on the ba- sis of calculating correlation dimension and Hurst exponent of sound time series on different subcooling condi- tions, the recognition of developing regime of the two-phase system is delivered, which provides a new practi- cal approach of recognition and diagnosis of vapor-liquid boiling system.