Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project X
The water conveyance tunnel is an important hydraulic structure in water conservancy projects. Typically, it manifests as a non-prismatic tunnel due to variations in the cross-sectional geometry, which give rise to an unpredictable flow pattern that significantly impacts the secure and stable operat...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-01-01
|
| Series: | Water |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4441/16/2/311 |
| _version_ | 1797342404736450560 |
|---|---|
| author | Songping Li Qun Yuan Yuliang Zhao Hongtao Cui Xiaoyu Su Ao Peng Yisheng Zhang |
| author_facet | Songping Li Qun Yuan Yuliang Zhao Hongtao Cui Xiaoyu Su Ao Peng Yisheng Zhang |
| author_sort | Songping Li |
| collection | DOAJ |
| description | The water conveyance tunnel is an important hydraulic structure in water conservancy projects. Typically, it manifests as a non-prismatic tunnel due to variations in the cross-sectional geometry, which give rise to an unpredictable flow pattern that significantly impacts the secure and stable operation of the tunnel. This study takes water conservancy project X as a case and investigates the hydraulic performances of a non-prismatic water conveyance tunnel using a scale model test and numerical simulation; the hydraulic performance, such as flow pattern, discharge, flow velocity, and water depth profile are analyzed for both free flow and submerged flow conditions. The results show that the simulation data fit well with the experimental value observed in the scale model test for free flow; however, a substantial discrepancy emerges under submerged flow conditions. This discrepancy is attributable to the presence of a vacuum in the distortional plan section. Notably, the effect of water entrainment phenomena on flow rate and velocity is diminished in the scale model test, emphasizing the advantage of numerical simulation in predicting hydraulic parameters for the prototype. On this basis, the optimization of the gate shaft arrangement is executed through numerical simulation; the results indicate that the vacuum issues in the contraction section were partially resolved through structure optimization. The simulation values are close to the experimental results, and the modified design of the tunnel can be used in a water conveyance project. |
| first_indexed | 2024-03-08T10:32:48Z |
| format | Article |
| id | doaj.art-c1b148e1fd74490d9f24851e31e4a282 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-08T10:32:48Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-c1b148e1fd74490d9f24851e31e4a2822024-01-26T18:52:00ZengMDPI AGWater2073-44412024-01-0116231110.3390/w16020311Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project XSongping Li0Qun Yuan1Yuliang Zhao2Hongtao Cui3Xiaoyu Su4Ao Peng5Yisheng Zhang6Henan Provincial Water Conservancy Technology Application Center, Zhengzhou 450003, ChinaHenan Provincial Water Conservancy Technology Application Center, Zhengzhou 450003, ChinaHenan Provincial Water Conservancy Technology Application Center, Zhengzhou 450003, ChinaHenan Provincial Water Conservancy Technology Application Center, Zhengzhou 450003, ChinaHenan Keda Water Conservancy Survey & Design Co., Ltd., Zhengzhou 450003, ChinaSchool of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, ChinaThe water conveyance tunnel is an important hydraulic structure in water conservancy projects. Typically, it manifests as a non-prismatic tunnel due to variations in the cross-sectional geometry, which give rise to an unpredictable flow pattern that significantly impacts the secure and stable operation of the tunnel. This study takes water conservancy project X as a case and investigates the hydraulic performances of a non-prismatic water conveyance tunnel using a scale model test and numerical simulation; the hydraulic performance, such as flow pattern, discharge, flow velocity, and water depth profile are analyzed for both free flow and submerged flow conditions. The results show that the simulation data fit well with the experimental value observed in the scale model test for free flow; however, a substantial discrepancy emerges under submerged flow conditions. This discrepancy is attributable to the presence of a vacuum in the distortional plan section. Notably, the effect of water entrainment phenomena on flow rate and velocity is diminished in the scale model test, emphasizing the advantage of numerical simulation in predicting hydraulic parameters for the prototype. On this basis, the optimization of the gate shaft arrangement is executed through numerical simulation; the results indicate that the vacuum issues in the contraction section were partially resolved through structure optimization. The simulation values are close to the experimental results, and the modified design of the tunnel can be used in a water conveyance project.https://www.mdpi.com/2073-4441/16/2/311non-prismatic tunnelscale model testnumerical simulationsubmerged flowvacuum |
| spellingShingle | Songping Li Qun Yuan Yuliang Zhao Hongtao Cui Xiaoyu Su Ao Peng Yisheng Zhang Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project X Water non-prismatic tunnel scale model test numerical simulation submerged flow vacuum |
| title | Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project X |
| title_full | Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project X |
| title_fullStr | Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project X |
| title_full_unstemmed | Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project X |
| title_short | Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project X |
| title_sort | investigation of hydraulic performance and arrangement optimization of non prismatic water conveyance tunnel a case study of project x |
| topic | non-prismatic tunnel scale model test numerical simulation submerged flow vacuum |
| url | https://www.mdpi.com/2073-4441/16/2/311 |
| work_keys_str_mv | AT songpingli investigationofhydraulicperformanceandarrangementoptimizationofnonprismaticwaterconveyancetunnelacasestudyofprojectx AT qunyuan investigationofhydraulicperformanceandarrangementoptimizationofnonprismaticwaterconveyancetunnelacasestudyofprojectx AT yuliangzhao investigationofhydraulicperformanceandarrangementoptimizationofnonprismaticwaterconveyancetunnelacasestudyofprojectx AT hongtaocui investigationofhydraulicperformanceandarrangementoptimizationofnonprismaticwaterconveyancetunnelacasestudyofprojectx AT xiaoyusu investigationofhydraulicperformanceandarrangementoptimizationofnonprismaticwaterconveyancetunnelacasestudyofprojectx AT aopeng investigationofhydraulicperformanceandarrangementoptimizationofnonprismaticwaterconveyancetunnelacasestudyofprojectx AT yishengzhang investigationofhydraulicperformanceandarrangementoptimizationofnonprismaticwaterconveyancetunnelacasestudyofprojectx |