Results 1 to 10 of about 239 (111)

Performance of water-jet pump under acceleration

International Journal of Naval Architecture and Ocean Engineering, 2021
The instantaneous acceleration affects the performance of the water-jet pump obviously. Here, based on the user-defined function, the method to simulate the inner flow in water-jet pumps under acceleration conditions was established.
Xian-Fang Wu, Ming-Hui Li, Hou-Lin Liu, Ming-Gao Tan, You-Dong Lu   +4 more
doaj   +4 more sources

Research on Cavitation Wake Vortex Structures Near the Impeller Tip of a Water-Jet Pump

Energies, 2023
Cavitation can cause noise in the water-jet pump. If cavitation occurs in the water-jet pump, the hydraulic components in the pump are prone to erosion. The surface erosion reduces energy delivery efficiency and increases maintenance costs.
Yun Long, Mingyu Zhang, Zhen Zhou, Jinqing Zhong, Ce An, Yong Chen, Churui Wan, Rongsheng Zhu   +7 more
doaj   +3 more sources

Direct Sailing Variable Acceleration Dynamics Characteristics of Water-Jet Propulsion with a Screw Mixed-Flow Pump

Applied Sciences, 2019
Strong nonlinearity and the relevance of time-varying dynamic parameters in the maneuverable process of water-jet propulsion were major problems encountered in the prediction of variable acceleration dynamics characteristics.
Wei Han, Ting Shang, Min Su, Chengyong Gong, Rennian Li, Bin Meng   +5 more
doaj   +3 more sources

Research on the Internal Flow Difference between Peak and Valley Conditions of Water Jet Propulsion Pump during Working at Hump Region

Journal of Marine Science and Engineering
When we tested the water jet propulsion pump, we found that there were significant vibrations in the pump, especially at small flow points that deviated from the design conditions. The water jet propulsion pump is a mixed-flow pump with guide vane, which
Hanqiao Han, Yun Long, Jinqing Zhong
doaj   +3 more sources

Evaluation of a Jet-Pump for the Improvement of Oil-Water Flow in Pipeline Loops Using CFD Tools [PDF]

E3S Web of Conferences, 2021
Despite their low efficiency compared with centrifugal pumps, jet pumps are highly reliable, robust equipment with modest maintenance, ideal for many applications, mainly in the oil & gas industry.
Asuaje Miguel, Toteff Jens, Noguera Ricardo   +2 more
doaj   +1 more source

Investigation on performance in water jet pump under turning conditions

Advances in Mechanical Engineering, 2022
Turning has a significant effect on the performance of water-jet pump. Here, the axial flow water-jet pump was used as the research object, the performance and inner flow characteristics of water-jet pump under different turning angle were simulated ...
Hou-Lin Liu, Ming-Hui Li, Xian-Fang Wu, Ming-Gao Tan, You-Dong Lu   +4 more
doaj   +1 more source

Experimental study of shock pressure and erosion characteristics of high‐pressure gas–liquid two‐phase jet: Exploration for improving coalbed methane extraction efficiency

Energy Science & Engineering, 2023
Coalbed methane extraction promotes energy exploitation and alleviates the greenhouse effect. This study aimed to analyze the technical potential of a high‐pressure gas–liquid two‐phase jet in increasing coalbed permeability and promoting coalbed methane
Longyong Shu, Yongpeng Fan, Yunlong Yang, Xin Song, Haijun Guo   +4 more
doaj   +1 more source

Dynamic Characteristics and Effect on Thrust of Jet Tail Vortex Ring for Pump Jet Propulsion

Frontiers in Energy Research, 2022
When a pump is propelled by a propeller, the nozzle flooding of the jet wake area will produce a turbulent quasi-sequence structure and have a certain impact on the outflow field structure and thrust characteristics of the water jet propulsion pump.
Wei Han, Zhixiong Li, Rennian Li, Huimin Feng, Lingbo Nan, Lingbo Nan, Jun Xu, Mingzhen Xiao   +7 more
doaj   +1 more source

Experimental study of controlling tip clearance flow in a pump-jet propulsor

Zhongguo Jianchuan Yanjiu, 2023
ObjectiveThis paper aims to suppress the adverse effects of tip clearance flow on the hydrodynamic performance and unsteady excitation force of a pump-jet propulsor. MethodAs for the pre-swirl stator pump-jet propulsor, an annular flexible seal structure
Ruilin HAN, Haiting YU, Hongxing HUA, Huiyao LI, Xiuchang HUANG, Xiaoqian DONG   +5 more
doaj   +1 more source

Construção de um sistema simples e compacto de recirculação d'água sob pressão para trompa d'água Construction of a simple and compact system to recirculate water under pressure using a water-jet aspira tor pump

Química Nova, 2009
Vacuum pumps are very useful in physical, chemical and biological experiments. In this communication it is described the design of a compact and low cost water recirculating system employing a water-jet aspirator pump as the vacuum source.
Dennis de Oliveira Imbroisi, Carmen Silvia Tavares de Santana, Cleônia Roberta Melo Araújo, Wilson Ceciliano da Silva, Cleylton Bezerra Lopes   +4 more
doaj   +1 more source