Experimental Investigation of Vapour Bubble Condensation in Subcooled Water Using Different Nozzles

Direct contact condensation phenomenon between steam and water takes place in various industrial applications. In this work, we experimentally investigate the bubble formation and collapsing processes for three different nozzles with a diameter of 1.7, 2.7, and 3.5 mm and with changing pool temperatures. The frequency of bubble creation, maximum bubble equivalent diameter at the bubble development stage, and bubble collapsing duration is investigated. The bubble equivalent diameter increases with rising pool water temperature for a particular nozzle size. Additionally, when the nozzle diameter increases at a given pool temperature, the equivalent bubble diameter also increases. Bubble formation frequency increases for lower pool water temperature and the opposite trend is found for increasing pool water temperature.