Journal of Thermophysics and Heat Transfer, ( ISI ), Volume (27), No (2), Year (2013-4) , Pages (286-297)

Title : ( Effect of Important Thermophysical Properties on Condensation Shock in a Steam Flow )

Authors: Mohammad Reza Mahpeykar , alireza mohammadi ,

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Abstract

When steam that does not contain any impurities and external particles, expands in the turbines and crosses the saturation line, it is not instantly condensed, but rather first enters supersaturated or supercooled conditions. The supercooled steam is in unstable state and during a time period, which depends on the supercooling degrees, by way of nucleation, i.e. the sudden formation of numerous minute liquid droplets and growth, returns to stable state, and consequently, equilibrium two-phase flow is reached. The modeling of this two-phase vapor-liquid flow, which starts with droplet formation (nucleation) and continues with rapid droplet growth and condensation shock, is highly dependent on the understanding of nucleation and defining its main thermo-physical properties. Despite numerous research conducted in this area, there still exists a great deal of uncertainty around the value of the influential parameters affecting the nucleation, in particular the droplet surface tension, which require further investigation. The factors which most .....

Keywords

, supercooled, nucleation, surface tension, isentropic index, condensation factor, Genetic Algorithm
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@article{paperid:1030845,
author = {Mahpeykar, Mohammad Reza and Mohammadi, Alireza},
title = {Effect of Important Thermophysical Properties on Condensation Shock in a Steam Flow},
journal = {Journal of Thermophysics and Heat Transfer},
year = {2013},
volume = {27},
number = {2},
month = {April},
issn = {0887-8722},
pages = {286--297},
numpages = {11},
keywords = {supercooled; nucleation; surface tension; isentropic index; condensation factor; Genetic Algorithm},
}

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%0 Journal Article
%T Effect of Important Thermophysical Properties on Condensation Shock in a Steam Flow
%A Mahpeykar, Mohammad Reza
%A Mohammadi, Alireza
%J Journal of Thermophysics and Heat Transfer
%@ 0887-8722
%D 2013

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