Establishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR

In this study reasonable 2D model was established by using FLUENT for start-up of analysis and evaluation of heat transfer flow characteristics in 1/6 scale model of VCS for HTTR. The pressure vessel temperature was set around 200 ℃, in which the ratio of heat transfer via natural convection has bee...

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Autores principales:	Shoji TAKADA, I Wayan NGARAYANA, Yukihiro NAKATSURU, Atuhiko TERADA, Kenta MURAKAMI, Kazuhiro SAWA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	scale model of vcs for httr k-ω-sst intermittency transition model thermal radiation natural convection turbulent flow Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/50f5e101e0854ee38f270342b1af94a3
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spelling	oai:doaj.org-article:50f5e101e0854ee38f270342b1af94a32021-11-29T05:56:30ZEstablishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR2187-974510.1299/mej.19-00536https://doaj.org/article/50f5e101e0854ee38f270342b1af94a32020-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/3/7_19-00536/_pdf/-char/enhttps://doaj.org/toc/2187-9745In this study reasonable 2D model was established by using FLUENT for start-up of analysis and evaluation of heat transfer flow characteristics in 1/6 scale model of VCS for HTTR. The pressure vessel temperature was set around 200 ℃, in which the ratio of heat transfer via natural convection has been numerically predicted to be around 20-30% of total heat removal in previous studies. This temperature is useful for the analysis code validation in the prediction of temperature distribution of components such as pressure vessel which is heated up by turbulent flow of natural convection. The numerical results of upper head of pressure vessel by the k-ω-SST intermittency transition model, which can adequately reproduce the separation, re-attachment and transition, reproduced the test results including temperature distribution well in contrast to those by the k-ε model in both cases that helium gas is evacuated or filled in the pressure vessel. It was emerged that any local hot spot did not appear on the top of upper head of pressure vessel where natural convection flow of air is separated in both cases. In addition, the plume of high temperature helium gas generated by the heating of heater was well mixed in the upper head and uniformly heated the inner surface of upper head without generating hot spots.Shoji TAKADAI Wayan NGARAYANAYukihiro NAKATSURUAtuhiko TERADAKenta MURAKAMIKazuhiro SAWAThe Japan Society of Mechanical Engineersarticlescale model of vcs for httrk-ω-sst intermittency transition modelthermal radiationnatural convectionturbulent flowMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 3, Pp 19-00536-19-00536 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	scale model of vcs for httr k-ω-sst intermittency transition model thermal radiation natural convection turbulent flow Mechanical engineering and machinery TJ1-1570
spellingShingle	scale model of vcs for httr k-ω-sst intermittency transition model thermal radiation natural convection turbulent flow Mechanical engineering and machinery TJ1-1570 Shoji TAKADA I Wayan NGARAYANA Yukihiro NAKATSURU Atuhiko TERADA Kenta MURAKAMI Kazuhiro SAWA Establishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR
description	In this study reasonable 2D model was established by using FLUENT for start-up of analysis and evaluation of heat transfer flow characteristics in 1/6 scale model of VCS for HTTR. The pressure vessel temperature was set around 200 ℃, in which the ratio of heat transfer via natural convection has been numerically predicted to be around 20-30% of total heat removal in previous studies. This temperature is useful for the analysis code validation in the prediction of temperature distribution of components such as pressure vessel which is heated up by turbulent flow of natural convection. The numerical results of upper head of pressure vessel by the k-ω-SST intermittency transition model, which can adequately reproduce the separation, re-attachment and transition, reproduced the test results including temperature distribution well in contrast to those by the k-ε model in both cases that helium gas is evacuated or filled in the pressure vessel. It was emerged that any local hot spot did not appear on the top of upper head of pressure vessel where natural convection flow of air is separated in both cases. In addition, the plume of high temperature helium gas generated by the heating of heater was well mixed in the upper head and uniformly heated the inner surface of upper head without generating hot spots.
format	article
author	Shoji TAKADA I Wayan NGARAYANA Yukihiro NAKATSURU Atuhiko TERADA Kenta MURAKAMI Kazuhiro SAWA
author_facet	Shoji TAKADA I Wayan NGARAYANA Yukihiro NAKATSURU Atuhiko TERADA Kenta MURAKAMI Kazuhiro SAWA
author_sort	Shoji TAKADA
title	Establishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR
title_short	Establishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR
title_full	Establishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR
title_fullStr	Establishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR
title_full_unstemmed	Establishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR
title_sort	establishment of reasonable 2-d model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for httr
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/50f5e101e0854ee38f270342b1af94a3
work_keys_str_mv	AT shojitakada establishmentofreasonable2dmodeltoinvestigateheattransferandflowcharacteristicsbyusingscalemodelofvesselcoolingsystemforhttr AT iwayanngarayana establishmentofreasonable2dmodeltoinvestigateheattransferandflowcharacteristicsbyusingscalemodelofvesselcoolingsystemforhttr AT yukihironakatsuru establishmentofreasonable2dmodeltoinvestigateheattransferandflowcharacteristicsbyusingscalemodelofvesselcoolingsystemforhttr AT atuhikoterada establishmentofreasonable2dmodeltoinvestigateheattransferandflowcharacteristicsbyusingscalemodelofvesselcoolingsystemforhttr AT kentamurakami establishmentofreasonable2dmodeltoinvestigateheattransferandflowcharacteristicsbyusingscalemodelofvesselcoolingsystemforhttr AT kazuhirosawa establishmentofreasonable2dmodeltoinvestigateheattransferandflowcharacteristicsbyusingscalemodelofvesselcoolingsystemforhttr
_version_	1718407584295157760

Establishment of reasonable 2-D model to investigate heat transfer and flow characteristics by using scale model of vessel cooling system for HTTR

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