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In the hydraulically suspended passive shutdown assembly, in order to prevent the liquid suspension rod falling too fast and the outer tube from violent impact, it is necessary to study the way to increase flow resistance. This study added grooves to the wall of the narrow channel to increase its flow resistance. Using the RNG k-ε turbulence model in Fluent, the influence of the groove structure parameters and the Reynolds number on the flow resistance of the narrow channel was discussed to find the optimal groove structure parameters. The results showed that the flow resistance of the narrow channel increased with the increase in the concave–convex ratio, and when the concave–convex ratio was small, the flow resistance decreased with increased groove thickness, while when the concave–convex ratio exceeded a certain critical value, the flow resistance increased with increased groove thickness. Additionally, the growth rate slowed down when the concave–convex ratio was greater than 3:1. As the unit length decreased, the flow resistance first increased and then decreased. When the unit length was 6 mm, the flow resistance reached the maximum. With the increase in the Reynolds number, the intensity of the local high-turbulence kinetic energy clearly increased.
Guodong Li; Dandan Cai; Shanshan Li; Xiaogang Li; Pengfeng Li; Juanli Zuo. The Influence of Groove Structure Parameters on the Maximum Flow Resistance of a Rectangular Narrow Channel. Energies 2020, 13, 3716 .
AMA StyleGuodong Li, Dandan Cai, Shanshan Li, Xiaogang Li, Pengfeng Li, Juanli Zuo. The Influence of Groove Structure Parameters on the Maximum Flow Resistance of a Rectangular Narrow Channel. Energies. 2020; 13 (14):3716.
Chicago/Turabian StyleGuodong Li; Dandan Cai; Shanshan Li; Xiaogang Li; Pengfeng Li; Juanli Zuo. 2020. "The Influence of Groove Structure Parameters on the Maximum Flow Resistance of a Rectangular Narrow Channel." Energies 13, no. 14: 3716.
A pneumatic lifting pump is used in sewage treatment, offshore oil production, and other fields because of its simple structure and strong practicability. In order to study its internal hydraulic characteristics and gas-liquid two-phase flow, this paper carries out experimental research on the influence of different air intake modes and riser diameters on the performance of a pneumatic lifting pump. The air-water two-phase flow pattern in the riser and motion characteristics of bubble formation at the nozzle are obtained by a high-speed camera. Through theoretical analysis, the theoretical model of a pneumatic lifting pump is established, and experimental results verify the theoretical model well. The results show that when the submergence ratio is constant, the lifting efficiency decreases with the smaller intake area under different intake areas; and the influences of different holes distributions on liquid flow rate and lifting efficiency are not significant under the same intake area. At the same submergence ratio, the smaller the riser diameter, the smaller the final lifting liquid flow rate and the larger the lifting efficiency peak value.
Juanli Zuo; Zuo Juanli; Ning Zhang; DengHui He; Wen Wang; Jie Zhang; Zhang. Experimental Study on Hydraulic Characteristics of Pneumatic Lifting Pump. Water 2020, 12, 388 .
AMA StyleJuanli Zuo, Zuo Juanli, Ning Zhang, DengHui He, Wen Wang, Jie Zhang, Zhang. Experimental Study on Hydraulic Characteristics of Pneumatic Lifting Pump. Water. 2020; 12 (2):388.
Chicago/Turabian StyleJuanli Zuo; Zuo Juanli; Ning Zhang; DengHui He; Wen Wang; Jie Zhang; Zhang. 2020. "Experimental Study on Hydraulic Characteristics of Pneumatic Lifting Pump." Water 12, no. 2: 388.
Rapid global development has resulted in the widespread use of water pipelines in industrial and agricultural production and life. During water transportation and deployment, water pipes with different angles need to be positioned according to different geographical and topographical problems. Flowmaster simulation software was used to simulate the leakage process of pipelines with different angles. The transient characteristics of fluids in the pipeline were studied in detail. The influences of parameters, such as the bending coefficient R/D (R is the turning radius of pipe, D is the inner diameter of pipe), leakage position, and leakage aperture on the transient flow law of pipelines with and without leakage, were analyzed. The results show that the periodic decay of the upstream flow and pressure curve at the valve with and without leakage has an insignificant relationship with the bending coefficient R/D; however, the amplitude of the sudden position change is positively correlated with the magnitude of R/D. The leakage aperture is positively correlated with the leakage flow and negatively correlated with the pressure value at the leak location node. The farther the leak position is from the valve, the greater the amplitude of the valve end pressure and the upstream flow curve, and symmetric fluctuations occur.
Qiaoling Zhang; Feng Wu; Zhendong Yang; Guodong Li; Juanli Zuo. Simulation of the Transient Characteristics of Water Pipeline Leakage with Different Bending Angles. Water 2019, 11, 1871 .
AMA StyleQiaoling Zhang, Feng Wu, Zhendong Yang, Guodong Li, Juanli Zuo. Simulation of the Transient Characteristics of Water Pipeline Leakage with Different Bending Angles. Water. 2019; 11 (9):1871.
Chicago/Turabian StyleQiaoling Zhang; Feng Wu; Zhendong Yang; Guodong Li; Juanli Zuo. 2019. "Simulation of the Transient Characteristics of Water Pipeline Leakage with Different Bending Angles." Water 11, no. 9: 1871.
Bridge piers on river channels can cause obstacles for flood flow by reducing the cross-sectional area and inducing local eddy currents and high flow velocities, which may destroy hydraulic structures. A two-dimensional numerical model was used to investigate the effects of bridge piers on river flood hazards in the Jialing River, China. For the modeling, Mike 21 FM was used, which is an unstructured mesh and finite volume model that solves the shallow water equations. The numerical model was validated with collected historical flood traces, and sensitivity analyses identified the effects of the Manning coefficient and the dependence on the grid size. The influence of backwater effects on the flow field was analyzed by comparing numerical results with and without piers. The results showed that the most significant impacts were caused by the Fengxian Bridge. The maximum water level rise was about 1 m and the maximum velocity near this bridge decreased by 22.77% for a 10-year flood. We found that the top elevations of planned levees near the bridges must be increased by 0.15–0.36 m. The influence of bridge piers on the flood velocity field is more complex. These findings will help flood hazard management in this river and provides a reference for similar projects.
Wen Wang; Kaibo Zhou; Haixiao Jing; Juanli Zuo; Peng Li; Zhanbin Li; Wang; Zhou; Jing; Zuo; Li. Effects of Bridge Piers on Flood Hazards: A Case Study on the Jialing River in China. Water 2019, 11, 1181 .
AMA StyleWen Wang, Kaibo Zhou, Haixiao Jing, Juanli Zuo, Peng Li, Zhanbin Li, Wang, Zhou, Jing, Zuo, Li. Effects of Bridge Piers on Flood Hazards: A Case Study on the Jialing River in China. Water. 2019; 11 (6):1181.
Chicago/Turabian StyleWen Wang; Kaibo Zhou; Haixiao Jing; Juanli Zuo; Peng Li; Zhanbin Li; Wang; Zhou; Jing; Zuo; Li. 2019. "Effects of Bridge Piers on Flood Hazards: A Case Study on the Jialing River in China." Water 11, no. 6: 1181.
Juanli Zuo; Wenxi Tian; Suizheng Qiu; Guanghui Su. Transient safety analysis for simplified accelerator driven system with gas-lift pump. Progress in Nuclear Energy 2018, 106, 181 -194.
AMA StyleJuanli Zuo, Wenxi Tian, Suizheng Qiu, Guanghui Su. Transient safety analysis for simplified accelerator driven system with gas-lift pump. Progress in Nuclear Energy. 2018; 106 ():181-194.
Chicago/Turabian StyleJuanli Zuo; Wenxi Tian; Suizheng Qiu; Guanghui Su. 2018. "Transient safety analysis for simplified accelerator driven system with gas-lift pump." Progress in Nuclear Energy 106, no. : 181-194.