Simulation analysis of the effects of friction on the performance of pressure regulator for drip tape
文献类型：期刊论文
| 作者 | Wang, Xiaoran1; Li, Guangyong1; Zhang, Chen2 |
| 刊名 | COMPUTERS AND ELECTRONICS IN AGRICULTURE
 |
| 出版日期 | 2021-05-01 |
| 卷号 | 184页码:11 |
| 关键词 | Microirrigation Pressure regulator (PR) Friction force Computational fluid dynamics (CFD) O-ring Regulation process |
| ISSN号 | 0168-1699 |
| DOI | 10.1016/j.compag.2021.106130 |
| 通讯作者 | Li, Guangyong(lgycau@163.com) |
| 英文摘要 | Pressure regulators (PRs) are critical equipment to ensure the safety and uniformity of irrigation systems, and their performance and stability are affected by the friction produced by the seal rings. This paper addresses the effects of friction on the performance of a drip tape inlet PR sealed by an O-ring. A dynamic numerical model considering the friction force was developed. The performance of the PR and characteristics of motion of the internal moving parts under different friction levels, inlet pressures, and flow conditions were calculated and analyzed. The results show that the simulated precision for outlet pressure is improved by considering the friction and depends on the magnitude of the friction force and working stages of the PR. Compared with a corresponding model where the friction is neglected, for friction levels of 2.5 N and 5 N, the normalized root mean square error (nRMSE) of the outlet pressure decreases by 3.8% and 6.9% in the transition stage and by 0.8% and 4% in the regulating stage, respectively. According to the response characteristics of the displacement curve of the regulating cup with respect to the variation in the regulation performance curve, the performance curve can be divided into three stages: the pressure raising stage, the transition stage and the regulating stage. Friction causes obvious outlet pressure fluctuations in the latter two stages by affecting the displacement increments of the moving parts, especially in the transition stage. Greater friction corresponds to greater fluctuations (expressed in terms of the variation coefficient of outlet pressure, CV) in the regulation performance curve, and the fluctuation amplitude increases with increasing flow rate. A PR with greater friction has a smaller applicable flow rate range to remain below a certain CV limit. When the friction is less than 7.5 N, the PR is suitable for a flow range of 400?1000 L/h. The rate of variation in the outlet pressure (?Pout) increases as the friction increment and flow rate increase and the inlet pressure decreases. ?Pout can be greater than 20%, mainly in the transition stage and when the friction increment is greater than 7.5 N. Considering the changes in outlet pressure caused by the lubricant loss and O-ring aging during long-term use of PRs, regular inspection and maintenance are recommended for PRs installed downstream of a submain, especially ones with long drip tapes. |
| 资助项目 | National Key Research and Development Program of China[2016YFC0400105] ; National Key Research and Development Program of China[2017YFD0701400] |
| WOS研究方向 | Agriculture ; Computer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000641357600002 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/161584]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Guangyong |
| 作者单位 | 1.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiaoran,Li, Guangyong,Zhang, Chen. Simulation analysis of the effects of friction on the performance of pressure regulator for drip tape[J]. COMPUTERS AND ELECTRONICS IN AGRICULTURE,2021,184:11. |
| APA | Wang, Xiaoran,Li, Guangyong,&Zhang, Chen.(2021).Simulation analysis of the effects of friction on the performance of pressure regulator for drip tape.COMPUTERS AND ELECTRONICS IN AGRICULTURE,184,11. |
| MLA | Wang, Xiaoran,et al."Simulation analysis of the effects of friction on the performance of pressure regulator for drip tape".COMPUTERS AND ELECTRONICS IN AGRICULTURE 184(2021):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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