Reduction of Thermodynamic Losses in a Supersonic Nucleating Steam Nozzle by Spraying Water Droplets
نویسندگان
1 Department of Mechanical Engineering,Berakly
2 Department of Mechanical Engineering,Amirkabir University of Technology
doi
چکیده
Abstract. During the course of expansion of steam in turbines, the vapour rst supercools and then nucleates to become a two-phase mixture. Formation of the liquid phase causes thermodynamic and aerodynamic losses in steam turbines. In this study, the treatment is a one-dimensional, non-equilibrium ow in a steady Laval nozzle. In this paper, the changes in the rate of nucleation, entropy, pressure and other parameters of the two-phase ow, subjected to spraying the liquid droplets close to the nozzle's throat, are investigated. By injecting the water droplets into a supersonic condensing ow, the thermodynamic loss is considerably decreased.
