Title of article :
Reduction of Thermodynamic Losses in a Supersonic Nucleating Steam Nozzle by Spraying Water Droplets.
Author/Authors :
Mahpeykar, M. R. ferdowsi university of mashhad - Department of Mechanical Engineering, مشهد, ايران , Lakzian, E. ferdowsi university of mashhad - Department of Mechanical Engineering, مشهد, ايران , Amirirad, E. ferdowsi university of mashhad - Department of Mechanical Engineering, مشهد, ايران
Abstract :
During the course of expansion of steam in turbines, the vapour first 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 flow in a steady Laval nozzle. In this paper, the changes in the rate of nucleation, entropy, pressure and other parameters of the two-phase flow, subjected to spraying the liquid droplets close to the nozzle s throat, are investigated. By injecting the water droplets into a supersonic condensing flow, the thermodynamic loss is considerably decreased.
Keywords :
Two , phase flow , Convergent , divergent nozzle , Nucleation.
Journal title :
Scientia Iranica(Transactions B:Mechanical Engineering)
Journal title :
Scientia Iranica(Transactions B:Mechanical Engineering)
