One-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam

Unsteadiness in supersonic flow in nozzles can be generated by the release of heat due to spontaneous condensation. The heat released is termed �supercritical� and may be responsible for turbine blades failure in turbine cascade as it causes a supersonic flow to decelerate. When the Mach number is r...

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Main Authors: Malek N.A., Hasini H., Yusoff M.Z.
Other Authors: 36994735300
Format: Conference paper
Published: Institute of Physics Publishing 2023
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Institution: Universiti Tenaga Nasional
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spelling my.uniten.dspace-300512023-12-29T15:44:11Z One-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam Malek N.A. Hasini H. Yusoff M.Z. 36994735300 6507435998 7003976733 Turbines Droplet growth Governing equations Heat additions Numerical solution One-dimensional analysis Spontaneous condensation Turbine blade Turbine cascade conference proceeding experimental study heat flux numerical model one-dimensional modeling turbine unsteady flow Supersonic flow Unsteadiness in supersonic flow in nozzles can be generated by the release of heat due to spontaneous condensation. The heat released is termed �supercritical� and may be responsible for turbine blades failure in turbine cascade as it causes a supersonic flow to decelerate. When the Mach number is reduced to unity, the flow can no longer sustain the additional heat and becomes unstable. This paper aims to numerically investigate the unsteadiness caused by supercritical heat addition in one-dimensional condensing flows. The governing equations for mass, momentum and energy, coupled with the equations describing the wetness fraction and droplet growth are integrated and solved iteratively to reveal the final solution. Comparison is made with well-established experimental and numerical solution done by previous researchers that shows similar phenomena. � Published under licence by IOP Publishing Ltd. Final 2023-12-29T07:44:11Z 2023-12-29T07:44:11Z 2013 Conference paper 10.1088/1755-1315/16/1/012150 2-s2.0-84881110719 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881110719&doi=10.1088%2f1755-1315%2f16%2f1%2f012150&partnerID=40&md5=5dc4b1099d8367b33ef1c72489d66b91 https://irepository.uniten.edu.my/handle/123456789/30051 16 1 12150 All Open Access; Gold Open Access Institute of Physics Publishing Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
topic Turbines
Droplet growth
Governing equations
Heat additions
Numerical solution
One-dimensional analysis
Spontaneous condensation
Turbine blade
Turbine cascade
conference proceeding
experimental study
heat flux
numerical model
one-dimensional modeling
turbine
unsteady flow
Supersonic flow
spellingShingle Turbines
Droplet growth
Governing equations
Heat additions
Numerical solution
One-dimensional analysis
Spontaneous condensation
Turbine blade
Turbine cascade
conference proceeding
experimental study
heat flux
numerical model
one-dimensional modeling
turbine
unsteady flow
Supersonic flow
Malek N.A.
Hasini H.
Yusoff M.Z.
One-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
description Unsteadiness in supersonic flow in nozzles can be generated by the release of heat due to spontaneous condensation. The heat released is termed �supercritical� and may be responsible for turbine blades failure in turbine cascade as it causes a supersonic flow to decelerate. When the Mach number is reduced to unity, the flow can no longer sustain the additional heat and becomes unstable. This paper aims to numerically investigate the unsteadiness caused by supercritical heat addition in one-dimensional condensing flows. The governing equations for mass, momentum and energy, coupled with the equations describing the wetness fraction and droplet growth are integrated and solved iteratively to reveal the final solution. Comparison is made with well-established experimental and numerical solution done by previous researchers that shows similar phenomena. � Published under licence by IOP Publishing Ltd.
author2 36994735300
author_facet 36994735300
Malek N.A.
Hasini H.
Yusoff M.Z.
format Conference paper
author Malek N.A.
Hasini H.
Yusoff M.Z.
author_sort Malek N.A.
title One-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_short One-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_full One-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_fullStr One-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_full_unstemmed One-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_sort one-dimensional analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
publisher Institute of Physics Publishing
publishDate 2023
_version_ 1806427304480473088