Pressure oscillation characteristics of direct contact condensation in a microchannel
In order to investigate the instantaneous pressure oscillation characteristics of steam direct contact intermittent condensation under microscale conditions,experiments and spectral analysis were conducted on the measurement of intermittent condensation pressure in a T-shaped microchannel.It was found that under the working conditions of steam temperature 100℃,steam mass flow rate 0.45g/min,supercooled water temperature 40℃ and supercooled water mass flow rate 12.65g/min,the time domain signal of intermittent condensation pressure fluctuates between-29.5kPa and 8.8kPa,and the probability density of the pressure value near 2.5kPa was the largest.In addition,through spectrum analysis,it was found that the first dominant frequency of the pressure frequency domain signal was 10Hz,which was similar to the number of cycles experienced by intermittent condensation within one second.
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