Numerical study on flow and heat transfer characteristics of the double-hole jet in flowing liquid

Abstract

In this paper, a numerical study of double hole water jet condensation is presented, and the heat transfer mechanism of double hole jet is obtained. Firstly, the flow characteristics along the axis of plume were investigated, and the mechanism of interaction between adjacent plumes was analyzed. With the increasing of the inlet pressure of steam, the plume length increases gradually. Then it is found that the temperature of the subcooled liquid had a restraining effect on the length of plume, and the higher temperature difference in heat transfer increases the mass exchange of interface between liquid and gas. The effect of the structural parameters of the nozzle on the plume was also analyzed. As the hole spacing decreases, the degree of plume convergence increased. The plume was more susceptible to mutual influences with the increase of nozzle diameter. Finally, a new correlation for double-hole plume length was proposed by comparing with the existing prediction correlation.