Pressure oscillation induced by steam jet condensation in water through a nozzle

In order to obtain the pressure oscillation characteristics due to steam jet in water, an experiment was carried out to investigate the pressure oscillation characteristics at various axial positions and different water temperatures. The experimental system mainly consists of a steam generator, a surge tank, a nozzle, a water tank, instrumentations, a camera and a data acquisition system. The pressure oscillation amplitudes were measured and the main frequency was gained by the FFT method. The effects of the water temperature and position on the oscillation characteristic were analyzed. The results show that pressure oscillation amplitudes increased with water temperature, but a decreasing trend was found at high water temperatures. The main frequency decreased as water temperature increased, while the axial position had no effect on the main frequency. In addition, an existing correlation was used to predict the main frequency, and a good agreement was achieved between the predictions and the experiment data.