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
From page
253
To page
262
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)
Record number
2700167
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