Experimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions

Self-aerated technology of valve lintel (SATVL) is widely used in high head navigation lock water delivery system to address the cavitation problem. To optimize the structural parameters of valve intel including the height of the throat ( $ h_1=20\,{\rm mm} $ ) and divergent part enhance ( $ h_2 $ )...

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Autores principales:	Bo Wu, Ya-an Hu, Xin Wang, Xiujun Yan
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	self-aerated flow the critical self-aerated conditions response surface methodology optimization Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/ea7c9efe9d0146dfb43e652616406af0
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spelling	oai:doaj.org-article:ea7c9efe9d0146dfb43e652616406af02021-11-04T15:00:43ZExperimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions1994-20601997-003X10.1080/19942060.2021.1975572https://doaj.org/article/ea7c9efe9d0146dfb43e652616406af02021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/19942060.2021.1975572https://doaj.org/toc/1994-2060https://doaj.org/toc/1997-003XSelf-aerated technology of valve lintel (SATVL) is widely used in high head navigation lock water delivery system to address the cavitation problem. To optimize the structural parameters of valve intel including the height of the throat ( $ h_1=20\,{\rm mm} $ ) and divergent part enhance ( $ h_2 $ ), the length of the throat part ( $ L_2 $ ) and the divergent part ( $ L_3 $ ), and the diffusion angle ( $ \beta $ ) for better self-aerated performance, the dimensionless structural parameters $ h_2/h_1, L_2/h_1, L_3/h_1 $ and beta were chosen as the variables. The conception of critical self-aerated conditions was proposed via theoretical analysis and experimental verification for the first time, and the slope m of critical self-aerated conditions was taken as the response to assess self-aerated performance. The method of combing Response Surface Methodology (RSM) with Central Composite Design (CCD) was introduced to systematically investigate the effects of the structural parameters on the self-aerated performance. A 1: 1 full-scale slicing physical model and CFD simulations were designed to capture the critical self-aerated conditions. Finally, though multiple regression analysis, a quadratic polynomial equation between m and structural parameters was obtained. It was found that: (i) the results of theoretical analysis and physical model verification confirmed the hypothesis of critical self-aerated conditions. (ii) with the aid of ANOVA, the sensitivity of structural parameters which influenced critical self-aerated conditions is $ {\rm F}(h_2/h_1) > {\rm F}(L_3/h_l) > {\rm F}(\beta) > {\rm F}(L_2/h_1) $ . (iii) the optimal structural parameters are $ h_2/h_1=1.25, L_2/h_1=3.5, L_3/h_1=160 $ and $ \beta =2.5^{\circ} $ . The result indicate that the substantial improvement of self-aerated performance can be achieve by using those optimal structural parameters.Bo WuYa-an HuXin WangXiujun YanTaylor & Francis Grouparticleself-aerated flowthe critical self-aerated conditionsresponse surface methodologyoptimizationEngineering (General). Civil engineering (General)TA1-2040ENEngineering Applications of Computational Fluid Mechanics, Vol 15, Iss 1, Pp 1629-1644 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	self-aerated flow the critical self-aerated conditions response surface methodology optimization Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	self-aerated flow the critical self-aerated conditions response surface methodology optimization Engineering (General). Civil engineering (General) TA1-2040 Bo Wu Ya-an Hu Xin Wang Xiujun Yan Experimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions
description	Self-aerated technology of valve lintel (SATVL) is widely used in high head navigation lock water delivery system to address the cavitation problem. To optimize the structural parameters of valve intel including the height of the throat ( $ h_1=20\,{\rm mm} $ ) and divergent part enhance ( $ h_2 $ ), the length of the throat part ( $ L_2 $ ) and the divergent part ( $ L_3 $ ), and the diffusion angle ( $ \beta $ ) for better self-aerated performance, the dimensionless structural parameters $ h_2/h_1, L_2/h_1, L_3/h_1 $ and beta were chosen as the variables. The conception of critical self-aerated conditions was proposed via theoretical analysis and experimental verification for the first time, and the slope m of critical self-aerated conditions was taken as the response to assess self-aerated performance. The method of combing Response Surface Methodology (RSM) with Central Composite Design (CCD) was introduced to systematically investigate the effects of the structural parameters on the self-aerated performance. A 1: 1 full-scale slicing physical model and CFD simulations were designed to capture the critical self-aerated conditions. Finally, though multiple regression analysis, a quadratic polynomial equation between m and structural parameters was obtained. It was found that: (i) the results of theoretical analysis and physical model verification confirmed the hypothesis of critical self-aerated conditions. (ii) with the aid of ANOVA, the sensitivity of structural parameters which influenced critical self-aerated conditions is $ {\rm F}(h_2/h_1) > {\rm F}(L_3/h_l) > {\rm F}(\beta) > {\rm F}(L_2/h_1) $ . (iii) the optimal structural parameters are $ h_2/h_1=1.25, L_2/h_1=3.5, L_3/h_1=160 $ and $ \beta =2.5^{\circ} $ . The result indicate that the substantial improvement of self-aerated performance can be achieve by using those optimal structural parameters.
format	article
author	Bo Wu Ya-an Hu Xin Wang Xiujun Yan
author_facet	Bo Wu Ya-an Hu Xin Wang Xiujun Yan
author_sort	Bo Wu
title	Experimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions
title_short	Experimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions
title_full	Experimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions
title_fullStr	Experimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions
title_full_unstemmed	Experimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions
title_sort	experimental and cfd study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/ea7c9efe9d0146dfb43e652616406af0
work_keys_str_mv	AT bowu experimentalandcfdstudyontheoptimizationofvalvelintelsstructuralparametersundercriticalselfaeratedconditions AT yaanhu experimentalandcfdstudyontheoptimizationofvalvelintelsstructuralparametersundercriticalselfaeratedconditions AT xinwang experimentalandcfdstudyontheoptimizationofvalvelintelsstructuralparametersundercriticalselfaeratedconditions AT xiujunyan experimentalandcfdstudyontheoptimizationofvalvelintelsstructuralparametersundercriticalselfaeratedconditions
_version_	1718444807306608640

Experimental and CFD study on the optimization of valve lintel’s structural parameters under critical self-aerated conditions

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