Diagnostics of Boiling Crisis

The results of experimental investigation of thermal pulsations in nucleate and film modes of water boiling under Joule heating of a wire heater and a porous cylindrical rod are presented. Pulsation power spectra have been determined from experimental data. It has been shown that in the transition modes of boiling from nucleate to film boiling the frequency dependence of the power spectra acquires a characteristic \(1/f\) form. Such frequency dependence of the spectra indicates the possibility of large-scale low-frequency emissions. The pulsation power spectra found from experimental data can be used to diagnose the transition to the crisis mode of heat transfer.