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CFD analysis of unsteady flows due to supercritical heat addition in high speed condensing steam

This study is mainly to investigate the unsteady flows due to supercritical heat addition in high speed condensing steam in steam turbines. To achieve this, condensation flow characteristic is investigated on 2D converging-diverging nozzle. A Computational Fluid Dynamics (CFD) code (FLUENT package)...

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Main Authors: Malek N.A., Jamaluddin S.A., Yusoff M.Z., Hasini H.
Other Authors: 36994735300
Format: Article
Published: Penerbit UTM Press 2023
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spelling my.uniten.dspace-222312023-05-29T13:59:44Z CFD analysis of unsteady flows due to supercritical heat addition in high speed condensing steam Malek N.A. Jamaluddin S.A. Yusoff M.Z. Hasini H. 36994735300 56902487900 7003976733 6507435998 This study is mainly to investigate the unsteady flows due to supercritical heat addition in high speed condensing steam in steam turbines. To achieve this, condensation flow characteristic is investigated on 2D converging-diverging nozzle. A Computational Fluid Dynamics (CFD) code (FLUENT package) that adopted the Eulerian-Eulerian approach for modeling wet steam flow, was used. The condensing flow is governed by the compressible Navier-Stokes equations in conjunction with a wet steam multiphase model. The turbulence model selected for this work is Spalart Allmaras model which is based on the Reynolds Averaged Navier Stoke (RANS) model available in FLUENT. Results are then compared with previous researchers that use different methods including user defined code and experiment. The importance of this research study is to determine the accuracy of the software and method used and to compare the results with other researchers.The current work shows good agreement with the experimental data done by Skilling [1] and 2D calculations done by Yusoff et al. [2]. It is found from the numerical simulation results that the supercritical heat addition has caused the flow in the condensing steam to retard and gives rise to pressure oscillations. The unsteady supercritical heat addition reveals promising results indicating the capability of FLUENT to calculate this phenomenon which might cause instability in turbine channel. � 2015 Penerbit UTM Press. All rights reserved. Final 2023-05-29T05:59:44Z 2023-05-29T05:59:44Z 2015 Article 10.11113/jt.v76.5791 2-s2.0-84944212585 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944212585&doi=10.11113%2fjt.v76.5791&partnerID=40&md5=fa05581efb53e3ee339a324647762a0d https://irepository.uniten.edu.my/handle/123456789/22231 76 10 37 42 Penerbit UTM Press Scopus
institution Universiti Tenaga Nasional
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description This study is mainly to investigate the unsteady flows due to supercritical heat addition in high speed condensing steam in steam turbines. To achieve this, condensation flow characteristic is investigated on 2D converging-diverging nozzle. A Computational Fluid Dynamics (CFD) code (FLUENT package) that adopted the Eulerian-Eulerian approach for modeling wet steam flow, was used. The condensing flow is governed by the compressible Navier-Stokes equations in conjunction with a wet steam multiphase model. The turbulence model selected for this work is Spalart Allmaras model which is based on the Reynolds Averaged Navier Stoke (RANS) model available in FLUENT. Results are then compared with previous researchers that use different methods including user defined code and experiment. The importance of this research study is to determine the accuracy of the software and method used and to compare the results with other researchers.The current work shows good agreement with the experimental data done by Skilling [1] and 2D calculations done by Yusoff et al. [2]. It is found from the numerical simulation results that the supercritical heat addition has caused the flow in the condensing steam to retard and gives rise to pressure oscillations. The unsteady supercritical heat addition reveals promising results indicating the capability of FLUENT to calculate this phenomenon which might cause instability in turbine channel. � 2015 Penerbit UTM Press. All rights reserved.
author2 36994735300
author_facet 36994735300
Malek N.A.
Jamaluddin S.A.
Yusoff M.Z.
Hasini H.
format Article
author Malek N.A.
Jamaluddin S.A.
Yusoff M.Z.
Hasini H.
spellingShingle Malek N.A.
Jamaluddin S.A.
Yusoff M.Z.
Hasini H.
CFD analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
author_sort Malek N.A.
title CFD analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_short CFD analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_full CFD analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_fullStr CFD analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_full_unstemmed CFD analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
title_sort cfd analysis of unsteady flows due to supercritical heat addition in high speed condensing steam
publisher Penerbit UTM Press
publishDate 2023
_version_ 1806424286694473728
score 13.222552

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