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Zhihong Wang, Chunguang Wang and Weiping Tian
In order to study the flow characteristics of a nozzle with large expansion ratio and its influence on the force on the nozzle, ground cold flow test research and a fluid?structure coupling simulation analysis were carried out (maximum expansion ratio e ...
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Donglei Wu and Yalei Bai
This paper investigates the influence of pressure pulsation and flow-induced noise using a two-way dual-purpose pump. The pressure pulsation signal is obtained from the Detached Eddy Simulation (DES) turbulent model calculation as the fan sound source, a...
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Yalei Bai and Donglei Wu
In daily operation, the flow state in the runner chamber of an axial flow pump is extremely complex, and the pressure pulsation caused by the vibration of the unit and the hydraulic excitation is also extremely complex. The pressure pulsation will also g...
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Gaoan Zheng, Pu Xu, Lin Li and Xinghua Fan
The pipeline system is widely used in marine engineering, and the formation mechanism and flow patterns of two-phase slug flows are of great significance for the optimal design of and vibration prevention in a complex pipeline system. Aiming at the above...
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Jian Wang, Ze Chen, Linghao Li, Chuan Wang, Kangle Teng, Qiang He, Jiren Zhou, Shanshan Li, Weidong Cao, Xiuli Wang and Hongliang Wang
Submersible tubular pumps are an ideal choice for pump stations that require high flow rates and low lift. These pumps combine the unique features of submersible motors with axial flow pump technology, making them highly efficient and cost-effective. The...
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Yadong Zhu, Haifeng Jiao, Shihui Wang, Wenbo Zhu, Mengcheng Wang and Songshan Chen
In order to study the pressure pulsation characteristics and structural dynamic response characteristics of a vertical shaft cross-flow pump, this study used a computational fluid dynamics (CFD) numerical simulation method to analyze the pressure pulsati...
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Tao Zhang, Zilong Hu, Xinjun Liu, Jiahao Lu, Xijie Song, Di Zhu and Zhengwei Wang
Hydroelectric power generation is an important clean energy source, and the stability of water turbine operation determines the quality of hydro energy utilization. For hydro turbines, the layout direction of the draft tube is often only considered from ...
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Dongtao Ji, Weigang Lu, Linguang Lu, Lei Xu, Jun Liu, Wei Shi and Guohao Huang
The shaft front-positioned tubular pump device has been widely used in practical engineering, but the shaft rear-positioned pump device is rarely used due to its low efficiency. To investigate the effect of the shaft position on the performance of a tubu...
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Zhipeng Zhu and Houlin Liu
Ship ballast pumps have stringent requirements for their transient characteristics. Here, the pneumatic control valve and programmable logic controller (PLC) are applied to realize the rapid reduction in flow rate for ballast pumps, and the dynamic press...
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Fan Yang, Pengcheng Chang, Yao Yuan, Na Li, Rongsheng Xie, Xiaowen Zhang and Zhikang Lin
Vertical axial flow pump device has the characteristics of large flow and low head, which is widely used in pumping station projects with head of 3?9 m. In order to study the influence of the timing effect of the impeller relative flow channel and guide ...
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Baoling Cui and Mingyu Shi
Centrifugal pumps are essential fluid transfer devices in marine engineering. As the two most critical components of a centrifugal pump, the dynamic?static interference between the volute and the impeller makes the flow near the cutwater highly unstable,...
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Guangjie Peng, Yuan Lou, Dehui Yu, Shiming Hong, Guangchao Ji, Lie Ma and Hao Chang
Marine sediment pumps are extensively applied in marine engineering fields with complex media and harsh flow conditions. Therefore, this study conducts a multi-factor optimization design for a marine sediment pump. The response surface optimization metho...
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Zhi Rao, Lingfeng Tang and Hui Zhang
Aiming at the problem of high vibration and high wear of centrifugal pump tongue, this paper proposes a double-tongue volute structure. Under the condition of ensuring the reliability of CFD results, the influence of various combinations of tongue and vo...
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Yaping Zhao, Yanrong Li, Jianjun Feng, Mengfan Dang, Yajing Ren and Xingqi Luo
Tubular turbines are widely used in low water head and tidal power development due to their straight flow path, simple structure, and wide efficient area. However, the severe vibration during actual operation greatly affects the safe operation of the tub...
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Linmin Shang, Jingwei Cao, Xin Jia, Shengrui Yang, Sainan Li, Lei Wang, Zhengwei Wang and Xiaobing Liu
The pumped storage power station plays a vital role in modern power systems, where the key component is the pump turbine. Variable-speed operation can improve the operating efficiency of the pump turbine and increase the operating efficiency under turbin...
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Yifan Wang, Kun Jin, Xingxing Huang, Peng Lin, Zhengwei Wang, Wenliang Wang and Lingjiu Zhou
In this paper, a 1000 MW Francis turbine was used to study the influences of uneven clearance distribution caused by various radial installation deviations on the hydraulic thrust of a runner under the rated operating condition with steady-state CFD anal...
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Weidong Cao, He Wang, Xinyu Yang and Xinyi Leng
The methodologies of computational fluid dynamics (CFD) and response surface method (RSM) were integrated to uncover the optimal correlational framework for intricate hydraulic geometric parameters of guide vane centrifugal pumps. Parameters such as blad...
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Feng Han, Xionghuan Chen, Yang Yang and Chuan Wang
In this article, the influence of rotor?stator distance on the pump performance and rotor?stator interaction strength within mixed-flow centrifugal pump was investigated based on numerical calculation and test verification. Firstly, the performances of m...
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Dongtao Ji, Weigang Lu, Lei Xu and Linguang Lu
For pumping station projects in plain areas, shaft tubular pump devices are often used due to the low head. In actual operation, the common working range of the pump device is generally 0.8 Qbep~1.2 Qbep. Therefore, it is of great significance to study t...
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Baoling Cui, Xiaotian Han and Yinchu An
Cavitation is an undesirable phenomenon in the pumps. In this paper, unsteady cavitation flow in a low-specific-speed centrifugal pump with an inducer is investigated based on the full cavitation model and standard k-e turbulence model using the commerci...
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