Experimental analysis to subcooled boiling sound oscillation in two-phase tube through frequency spectra and time series analysis method and regime recognition

摘要

The paper deals with studies in the field of thermo-acoustic effect in subcooled boiling two-phase tube system. With the time series of sound pressure and their frequency spectra, a phenomenal investigation, including the observation of frequency combination, stationary wave, etc., and a brief synergetic explanation to the self-organization essence of sound field, is presented. By applying AR model, experimental modellign, with which observation of sound amplification and short-time prediction to the acoustic time series is delivered, is satisactorily carried out. Finally, based on frequency spectra and AR parameters, regime recognition of subcooled boiling in experiment is worked, which lays a foundation to the two-phase system control.