Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts

The baffle drop shaft is widely used in deep tunnel drainage systems due to its fine applicability and high energy dissipation. To fully study the turbulence characteristics and energy dissipation mechanism of baffle drop shafts, a 1:25 scale physical model test and a numerical simulation based on t...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Qinghua Yang, Qian Yang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	baffle drop shaft energy dissipation calculation model energy dissipation mechanism energy dissipation rate hydraulic model test numerical simulation Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/d41dfee6e52c4e9cb92e27febdd712f5
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:d41dfee6e52c4e9cb92e27febdd712f5
record_format	dspace
spelling	oai:doaj.org-article:d41dfee6e52c4e9cb92e27febdd712f52021-11-06T11:01:55ZNumerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts0273-12231996-973210.2166/wst.2021.137https://doaj.org/article/d41dfee6e52c4e9cb92e27febdd712f52021-05-01T00:00:00Zhttp://wst.iwaponline.com/content/83/9/2259https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732The baffle drop shaft is widely used in deep tunnel drainage systems due to its fine applicability and high energy dissipation. To fully study the turbulence characteristics and energy dissipation mechanism of baffle drop shafts, a 1:25 scale physical model test and a numerical simulation based on the Realizable k-ε model and Volume of Fluid (VOF) method were performed. The results showed that a baffle spacing that is too dense or too sparse is not conducive to energy dissipation and discharge. The minimum baffle spacing is the optimal structural design at the design flow rate when the flow regime is free-drop flow. The energy dissipation calculation model established in this paper has high accuracy for calculating the energy dissipation rate on the baffles in free-drop flow. The energy dissipation modes of the shaft can be divided into inlet energy dissipation, baffle energy dissipation, and shaft-bottom energy dissipation. Baffles play a major role in the energy dissipation at low flow rates, and the proportions of inlet and shaft-bottom energy dissipation increase with the increase in flow rate. HIGHLIGHTS The calculation model of baffle energy dissipation has a better ability to predict the energy dissipation rate of the baffle drop shaft in the free-drop flow regime.; This paper elaborates on the energy dissipation mechanism of the baffle drop shaft through energy dissipation type and energy dissipation mode, which can provide help for in-depth analysis of the energy dissipation characteristics of baffle drop shafts.;Qinghua YangQian YangIWA Publishingarticlebaffle drop shaftenergy dissipation calculation modelenergy dissipation mechanismenergy dissipation ratehydraulic model testnumerical simulationEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 9, Pp 2259-2270 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	baffle drop shaft energy dissipation calculation model energy dissipation mechanism energy dissipation rate hydraulic model test numerical simulation Environmental technology. Sanitary engineering TD1-1066
spellingShingle	baffle drop shaft energy dissipation calculation model energy dissipation mechanism energy dissipation rate hydraulic model test numerical simulation Environmental technology. Sanitary engineering TD1-1066 Qinghua Yang Qian Yang Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts
description	The baffle drop shaft is widely used in deep tunnel drainage systems due to its fine applicability and high energy dissipation. To fully study the turbulence characteristics and energy dissipation mechanism of baffle drop shafts, a 1:25 scale physical model test and a numerical simulation based on the Realizable k-ε model and Volume of Fluid (VOF) method were performed. The results showed that a baffle spacing that is too dense or too sparse is not conducive to energy dissipation and discharge. The minimum baffle spacing is the optimal structural design at the design flow rate when the flow regime is free-drop flow. The energy dissipation calculation model established in this paper has high accuracy for calculating the energy dissipation rate on the baffles in free-drop flow. The energy dissipation modes of the shaft can be divided into inlet energy dissipation, baffle energy dissipation, and shaft-bottom energy dissipation. Baffles play a major role in the energy dissipation at low flow rates, and the proportions of inlet and shaft-bottom energy dissipation increase with the increase in flow rate. HIGHLIGHTS The calculation model of baffle energy dissipation has a better ability to predict the energy dissipation rate of the baffle drop shaft in the free-drop flow regime.; This paper elaborates on the energy dissipation mechanism of the baffle drop shaft through energy dissipation type and energy dissipation mode, which can provide help for in-depth analysis of the energy dissipation characteristics of baffle drop shafts.;
format	article
author	Qinghua Yang Qian Yang
author_facet	Qinghua Yang Qian Yang
author_sort	Qinghua Yang
title	Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts
title_short	Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts
title_full	Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts
title_fullStr	Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts
title_full_unstemmed	Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts
title_sort	numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/d41dfee6e52c4e9cb92e27febdd712f5
work_keys_str_mv	AT qinghuayang numericalinvestigationoftheturbulencecharacteristicsandenergydissipationmechanismofbaffledropshafts AT qianyang numericalinvestigationoftheturbulencecharacteristicsandenergydissipationmechanismofbaffledropshafts
_version_	1718443762184617984

Numerical investigation of the turbulence characteristics and energy dissipation mechanism of baffle drop shafts

Ejemplares similares