Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle

Conservation of energy is becoming increasingly important for the protection of the environment. Improving the efficiency of a refrigeration cycle is a critical factor to achieve this goal. Recently, an ejector system was developed that reduces the energy requirements of the compressor in the refrig...

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Autores principales:	Haruyuki NISHIJIMA, Kyohei TSUCHII, Masafumi NAKAGAWA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	multiphase flow supersonic flow shock waves visualization ejector Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/296e3c2f2ceb4c0cb861a692d530d0b9
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spelling	oai:doaj.org-article:296e3c2f2ceb4c0cb861a692d530d0b92021-11-26T06:58:33ZExperimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle2187-974510.1299/mej.16-00255https://doaj.org/article/296e3c2f2ceb4c0cb861a692d530d0b92016-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/6/3_16-00255/_pdf/-char/enhttps://doaj.org/toc/2187-9745Conservation of energy is becoming increasingly important for the protection of the environment. Improving the efficiency of a refrigeration cycle is a critical factor to achieve this goal. Recently, an ejector system was developed that reduces the energy requirements of the compressor in the refrigeration cycle. Two-phase-flow shock waves appear in the ejector under certain operating conditions and increase the pressure difference between suction inlet and outlet. Such shock waves play an important role in the ejector’s compression mechanism and thus merit a thorough investigation. In this work, we visualize the structure of a two-phase-flow shock wave in an ejector nozzle using a high-speed camera to monitor an optical beam transmitted through a refrigerant (hot water). As the pressure rises in the ejector outlet, the shock wave moves from the outlet to the nozzle throat and changes from an oblique shock wave to a normal shock wave. The shape of the output nozzle may modify the structure of the shock waves.Haruyuki NISHIJIMAKyohei TSUCHIIMasafumi NAKAGAWAThe Japan Society of Mechanical Engineersarticlemultiphase flowsupersonic flowshock wavesvisualizationejectorMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 6, Pp 16-00255-16-00255 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	multiphase flow supersonic flow shock waves visualization ejector Mechanical engineering and machinery TJ1-1570
spellingShingle	multiphase flow supersonic flow shock waves visualization ejector Mechanical engineering and machinery TJ1-1570 Haruyuki NISHIJIMA Kyohei TSUCHII Masafumi NAKAGAWA Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle
description	Conservation of energy is becoming increasingly important for the protection of the environment. Improving the efficiency of a refrigeration cycle is a critical factor to achieve this goal. Recently, an ejector system was developed that reduces the energy requirements of the compressor in the refrigeration cycle. Two-phase-flow shock waves appear in the ejector under certain operating conditions and increase the pressure difference between suction inlet and outlet. Such shock waves play an important role in the ejector’s compression mechanism and thus merit a thorough investigation. In this work, we visualize the structure of a two-phase-flow shock wave in an ejector nozzle using a high-speed camera to monitor an optical beam transmitted through a refrigerant (hot water). As the pressure rises in the ejector outlet, the shock wave moves from the outlet to the nozzle throat and changes from an oblique shock wave to a normal shock wave. The shape of the output nozzle may modify the structure of the shock waves.
format	article
author	Haruyuki NISHIJIMA Kyohei TSUCHII Masafumi NAKAGAWA
author_facet	Haruyuki NISHIJIMA Kyohei TSUCHII Masafumi NAKAGAWA
author_sort	Haruyuki NISHIJIMA
title	Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle
title_short	Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle
title_full	Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle
title_fullStr	Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle
title_full_unstemmed	Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle
title_sort	experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/296e3c2f2ceb4c0cb861a692d530d0b9
work_keys_str_mv	AT haruyukinishijima experimentalstudyonthebehaviorofthetwophaseflowshockwavesoccurringintheejectorrefrigerationcycle AT kyoheitsuchii experimentalstudyonthebehaviorofthetwophaseflowshockwavesoccurringintheejectorrefrigerationcycle AT masafuminakagawa experimentalstudyonthebehaviorofthetwophaseflowshockwavesoccurringintheejectorrefrigerationcycle
_version_	1718409707349082112

Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle

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