Occurrence Threshold of Pressure Oscillations Induced by Steam Condensation in Pool Water

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概要

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• Various types of pressure oscillations occur when steam is made to condence in pool water, depending on the pool water temperature and the steam mass flux. The pressure oscillations consist of high- and low-frequency components (around 200 Hz and several Hz, respectively, for the present apparatus). When the pool water temperature is raised, the pressure oscillations cease in order of high- and low-frequency components. Based on the experimental data, high- and low-frequency components were assumed to be pressure oscillations controlled by the volume of steam bubble and the volume including steam header respectively. The occurrence thresholds of pressure oscillation were analyzed by the linear stability theory as the limit whether any infinitesimal movements of steam-water interface diverge from the equilibrium condition. In the analysis, cylindrical and spherical bubble models were compared. The calculated thresholds by these bubble shapes were roughly consistent with published experimental data, although there are slight differences between models.

• 一般社団法人日本機械学会の論文

著者

• Hideki Nariai

  Institute Of Engineering Mechanics University Of Tsukuba

• Izuo Aya

  Osaka Branch Ship Research Institute

関連論文

• Occurrence Threshold of Pressure Oscillations Induced by Steam Condensation in Pool Water

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