| Cite this article: | 胡明宇,王文娥,胡笑涛,等.U形渠道平板闸门过流特性试验研究[J].灌溉排水学报,0,():-. |
| Hu Mingyu,Wang wene,Hu Xiaotao,et al.U形渠道平板闸门过流特性试验研究[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 489Times Download 0Times |
|
|
|
| DOI： |
|
| Experimental study on flow characteristics of sluice gates in the U-shaped channel |
|
Hu Mingyu, Wang wene, Hu Xiaotao, Wang Shilong, Fan Kai, Liu Dukun
|
|
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education,Northwest A FUniversity
|
| Abstract: |
| 【Objective】Secondary head loss can be avoided by sluice gate for measuring flow rate in the U-shaped channel. However, the flow characteristics of U-shaped sluice gate are quite different from those of rectangular sluice gate. Therefore, it is necessary to systematically study its hydraulic characteristics and establish flow formula. 【Method】According to the cross section characteristics of U-shaped channel, the U-shaped channel sluice gate was designed and the flow capacity test was carried out. The judgment basis of the critical ratio of orifice flow to weir flow and the influence factors of flow capacity were analyzed based on the water surface line and Froude number. At the same time the orifice flow formulas for different flow regime were established. 【Result】The critical ratio of orifice flow to weir flow is close to 1, the Froude number is uniformly distributed along the path, the average relative head loss was 7%, The error of the flow formula is less than 3.5%.【Conclusion】The head loss of U-shaped sluice gate is small with excellent hydraulic performance, the flow formula is accurate, it can provide basis for flow measurement of u-shaped channel in irrigation area. |
| Key words: U-shaped channel; sluice gate; hydraulic characteristics; orifice flow; flow measurement |
|
|
|
|
|
|
