Effect of Height and Geometry of Stepped Spillway on Inception Point Location
Air entrainment in a stepped spillway is very important to protect the spillway from cavitation damage. The inception point is the location where air starts entering the non-aerated flow zone. The inception point location depends on different parameters, such as the discharge, step height, and step...
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| Format: | Article |
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MDPI AG
2019-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/10/2091 |
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| author | Wuyi Wan Awais Raza Xiaoyi Chen |
| author_facet | Wuyi Wan Awais Raza Xiaoyi Chen |
| author_sort | Wuyi Wan |
| collection | DOAJ |
| description | Air entrainment in a stepped spillway is very important to protect the spillway from cavitation damage. The inception point is the location where air starts entering the non-aerated flow zone. The inception point location depends on different parameters, such as the discharge, step height, and step shape. In this paper, various stepped spillways, including flat steps, pooled steps, and round steps with different step heights were numerically simulated using the volume of fluid and realizable k-ε models. The results indicate that the inception point location moves downwards with the increase of the discharge of the stepped spillways. The length of the non-aerated flow zone increases with the discharge. The inception point location moves downwards as the step height decreases and the step number increases at the same discharge. The inception point location of the round stepped spillway model is much closer to the spillway crest than that of the flat stepped spillway with the same number of steps. The inception point location of the pooled stepped spillway is closer to the spillway crest than that of the flat stepped spillway, but more downstream than that of the round stepped spillway. |
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| id | doaj.art-a589b45895ac4d448f5bcbbaa1f16caf |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-13T14:10:31Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-a589b45895ac4d448f5bcbbaa1f16caf2022-12-21T23:42:29ZengMDPI AGApplied Sciences2076-34172019-05-01910209110.3390/app9102091app9102091Effect of Height and Geometry of Stepped Spillway on Inception Point LocationWuyi Wan0Awais Raza1Xiaoyi Chen2Department of Hydraulic Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, ChinaDepartment of Hydraulic Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, ChinaDepartment of Hydraulic Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, ChinaAir entrainment in a stepped spillway is very important to protect the spillway from cavitation damage. The inception point is the location where air starts entering the non-aerated flow zone. The inception point location depends on different parameters, such as the discharge, step height, and step shape. In this paper, various stepped spillways, including flat steps, pooled steps, and round steps with different step heights were numerically simulated using the volume of fluid and realizable k-ε models. The results indicate that the inception point location moves downwards with the increase of the discharge of the stepped spillways. The length of the non-aerated flow zone increases with the discharge. The inception point location moves downwards as the step height decreases and the step number increases at the same discharge. The inception point location of the round stepped spillway model is much closer to the spillway crest than that of the flat stepped spillway with the same number of steps. The inception point location of the pooled stepped spillway is closer to the spillway crest than that of the flat stepped spillway, but more downstream than that of the round stepped spillway.https://www.mdpi.com/2076-3417/9/10/2091stepped spillwayvolume of fluid (VOF)number of steps (<i>N</i>)realizable k-ε model |
| spellingShingle | Wuyi Wan Awais Raza Xiaoyi Chen Effect of Height and Geometry of Stepped Spillway on Inception Point Location Applied Sciences stepped spillway volume of fluid (VOF) number of steps (<i>N</i>) realizable k-ε model |
| title | Effect of Height and Geometry of Stepped Spillway on Inception Point Location |
| title_full | Effect of Height and Geometry of Stepped Spillway on Inception Point Location |
| title_fullStr | Effect of Height and Geometry of Stepped Spillway on Inception Point Location |
| title_full_unstemmed | Effect of Height and Geometry of Stepped Spillway on Inception Point Location |
| title_short | Effect of Height and Geometry of Stepped Spillway on Inception Point Location |
| title_sort | effect of height and geometry of stepped spillway on inception point location |
| topic | stepped spillway volume of fluid (VOF) number of steps (<i>N</i>) realizable k-ε model |
| url | https://www.mdpi.com/2076-3417/9/10/2091 |
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