Results 11 to 20 of about 47,929 (166)

Investigation on the Effect of the Shaft Transition Form on the Inflow Pattern and Hydrodynamic Characteristics of the Pre-Shaft Tubular Pump Device

Frontiers in Energy Research, 2022
The shaft tubular pump device is widely used in low head pumping stations in plain areas. The N-S equation and the SST k-ω turbulence model are adopted.
Can Luo, Kang Du, Weijun Qi, Li Cheng, Xianbei Huang, Jiaxing Lu, Jiaxing Lu   +6 more
doaj   +1 more source

Influence of Inlet Groove on Flow Characteristics in Stall Condition of Full-Tubular Pump

Frontiers in Energy Research, 2022
The full-tubular pump is a new type of pump with a narrow range of stable operation. In order to improve the internal flow characteristics of the full-tubular pump under small flow conditions and improve the safe and stable operating range of the pump ...
Lijian Shi, Lijian Shi, Yuhang Jiang, Yiping Cai, Beishuai Chen, Fangping Tang, Fangping Tang, Tian Xu, Jun Zhu, Yao Chai   +9 more
doaj   +1 more source

Research on Hydraulic Properties and Energy Dissipation Mechanism of the Novel Water-Retaining Labyrinth Channel Emitters

Agronomy, 2022
As a key component of a drip irrigation system, the performance of the drip irrigation emitters is mainly determined by the flow channel structures and structural parameters.
Yanfei Li, Xianying Feng, Yandong Liu, Xingchang Han, Haiyang Liu, Yitian Sun, Hui Li, Yining Xie   +7 more
doaj   +1 more source

Modeling Design and Research of Three-Dimensional Blades of 54 mm Turbodrill

Shiyou jixie, 2023
For the hydraulic loss caused by the impact of liquid to the rotor blade attributed to different circumferential velocities of liquid in cylindrical layers of the turbine rotor with different radii,a three-dimensional blade turbine was established using ...
Zhang Yuhang, Zhang Qiang, Xin Yong'an, Duan Chenwei, Ji Changgui   +4 more
doaj  

CFD modeling of the flow behavior around a PDC drill bit: effects of nano-enhanced drilling fluids on cutting transport and cooling efficiency

Engineering Applications of Computational Fluid Mechanics, 2022
In the present study, hydraulic and thermal performances of nano-enhanced drilling muds have been studied across the complex geometry of a rotating polycrystalline diamond compact (PDC) drill bit using computational fluid dynamics techniques. Toward this
Leila Esfahanizadeh, Bahram Dabir, Fatemeh Goharpey   +2 more
doaj   +1 more source

Influence of blade number on performance of multistage hydraulic turbine in turbine mode

Energy Science & Engineering, 2022
Compared with the traditional reverse multistage pump as hydraulic turbine, hydraulic turbine in turbine mode (T‐type turbine) with low specific speed has higher single‐stage energy head, which can effectively reduce stages and increase the stability ...
Lihong Zhang, Yanpin Li, Zichao Zhang, Jinbao Chen, Dexin Chen   +4 more
doaj   +1 more source

Numerical study on the energy performance of an axial-flow pump with different wall roughness

Frontiers in Energy Research, 2022
Pumping stations play an important role in China’s South-to-North Water Diversion, agricultural irrigation, and municipal drainage. Some pumping station units have been put into operation for long periods with improper operation and require maintenance ...
Yuling Chen, Qing Sun, Zhixiang Li, Yan Gong, Jianwei Zhai, Huixiang Chen   +5 more
doaj   +1 more source

Influence of Guide Vane Slope on Axial-Flow Hydraulic Performance and Internal Flow Characteristics

Energies, 2022
To comprehensively study the influence of the guide vane inlet slope on the axial-flow pump, eight groups of axial-flow pumps with different guide vane inlet slopes are designed and studied in this paper.
Yue Li, Yiwei Song, Shengsheng Xia, Qiang Li   +3 more
doaj   +1 more source

Hydraulic performance of non-pressurized mesh filter in front of pumps

Guan'gai paishui xuebao
【Objective】 Non-pressurized mesh filters are often installed in front of pumps to filter sediments and debris. In this paper, we study the influence of different irrigation water sources and backwash device parameters on hydraulic performance of a new ...
LEI Chenyu, LIU Zhenji, ZONG Quanli, YANG Hao, LONG Yangjuan, LU Chen   +5 more
doaj   +1 more source

Efficiency and hydraulic performance of the micro-pressure filter in front of the pump studied using PPR and NSGA-II

Guan'gai paishui xuebao
【Objective】 Pump often has a filter installed in the front of it to filter sediments and debris. This paper studied its efficiency and performance. 【Method】 The study was based on physical model, with flow rate being 2-8 m3/h, sediment content being 0.5 ...
TAO Hongfei, LI Qi, ZHOU Yang, Mahemujiang ·Aihemaiti, LI Qiao, JIANG Youwei   +5 more
doaj   +1 more source