Numerical study on dominant oscillation frequency of unstable steam jet under rolling condition

Abstract

Steam direct contact condensation has been widely applied in many fields because of its high heat and mass transfer efficiency. However, this process may cause damage to related devices due to its pressure oscillation, especially under ocean condition. The axial and radial components of the additional force and buoyancy force were analyzed in this numerical study. Results indicated that the Coriolis force played a more important role than other forces. The effects of rolling period and rolling angle on the dominant oscillation frequency were investigated. Under rolling condition, as the rolling period decreased and the rolling angle increased, the dominant oscillation frequency of steam submerged jet increased because of the enhanced Coriolis force, which promoted the necking of the bubble. Moreover, a correlation was proposed to predict the dominant oscillation frequency of steam submerged jet under rolling condition. The maximum deviation was less than ± 9.5%.