Results 11 to 20 of about 517 (109)

Research on the Influence of Tip Clearance of Axial-Flow Pump on Energy Characteristics under Pump and Turbine Conditions

Machines, 2022
In order to study the influence of tip clearance on the performance and energy dissipation of the axial-flow pump and the axial-flow pump as a turbine, and find the location of high dissipation rate, this study took an axial-flow pump model as its ...
Yanjun Li, Qixu Lin, Fan Meng, Yunhao Zheng, Xiaotian Xu   +4 more
doaj   +1 more source

Hydraulic optimization design of centrifugal pumps aiming at low vibration noise

AIP Advances, 2022
In order to reduce the vibration noise generated by the centrifugal pump in the working process and improve the working efficiency of the centrifugal pump, the sound field numerical calculation of IS80-65-160 single-stage single-suction centrifugal pump ...
Yuqin Wang, Jian Luo, Shuai Liu, Zhibo Han, Xiaoqiang Ni   +4 more
doaj   +1 more source

Vibration of Shaft System in the Mixed-Flow Pump Induced by the Rotor-Stator Interaction under Partial Load Conditions

Shock and Vibration, 2018
In order to reveal the relationship between rotor-stator interaction-induced unsteady flow and the shaft vibration of the mixed-flow pump, PIV (particle image velocimetry) and axis orbit experiments were carried out synchronously in a mixed-flow pump ...
Wei Li, Leilei Ji, Weidong Shi, Yulu Wang, Ling Zhou, Xiaoping Jiang   +5 more
doaj   +1 more source

Effects of distance between impeller and guide vane on losses in a low head pump by entropy production analysis

Advances in Mechanical Engineering, 2016
The low head pump is widely used in many important water conservation projects for drainage and irrigation purposes. A new type of low head pump, the bidirectional shaft tubular pump, consists of an S-shaped impeller, a straight-guide vane, an inlet ...
Ji Pei, Fan Meng, Yanjun Li, Shouqi Yuan, Jia Chen   +4 more
doaj   +1 more source

Numerical Investigation of Pressure Fluctuation in Centrifugal Pump Volute Based on SAS Model and Experimental Validation

Advances in Mechanical Engineering, 2014
This paper presents an investigation of pressure fluctuation of a single-suction volute-type centrifugal pump, particularly volute casing, by using numerical and experimental methods.
Qiaorui Si, Jianping Yuan, Shouqi Yuan, Wenjie Wang, Lei Zhu, Gérard Bois   +5 more
doaj   +1 more source

Significance of multi-level fusion in multi-component fault diagnosis under speed varying condition in rotational machinery [PDF]

FME Transactions
Most well-known challenging effects of identifying multiple defects in a rotational machine when speed is varied, are illustriously inspected by many researchers.
Saimurugan M., Sowmya S., Edinbarough Immanuel   +2 more
doaj   +1 more source

Experimental investigation of unsteady force suppression in a pump-jet rotor using oscillating stator trailing edge

Zhongguo Jianchuan Yanjiu
ObjectiveUnsteady forces generated by pump-jet rotors are a key factor affecting the vibration and noise levels of underwater vehicles. These forces not only induce structural vibrations through coupling between the propeller, shafting, and hull systems,
Wanghao TANG, Junjie XU, Xiuchang HUANG
doaj   +1 more source

Effect of Draft Tube Vortex Rope on Shaft System Mechanical Response in Pump-Turbines

Energies
During frequent peak-regulation operation, pumped storage units inevitably operate under off-design conditions. Variations in draft tube flow structures under different load conditions may alter the hydraulic loading acting on the runner and shaft system.
Yanhao Li, Likun Ding, Lei Chen, An Yu
doaj   +1 more source

Effect of purge air on rotor endwall heat transfer of an axial turbine

Journal of the Global Power and Propulsion Society, 2017
In order to gain in cycle efficiency, turbine inlet temperatures tend to rise, posing the challenge for designers to cool components more effectively. Purge flow injection through the rim seal is regularly used in gas turbines to limit the ingestion of ...
Sebastiano Lazzi Gazzini, Rainer Schädler, Anestis I. Kalfas, Reza S. Abhari, Sebastian Hohenstein, Gregor Schmid, Ewald Lutum   +6 more
doaj   +1 more source

Dynamic Characteristic Analysis of Angular Contact Ball Bearings with Two-Piece Inner Rings in Aero-Engine Main Shafts Under Unsteady-State Conditions

Lubricants
The dynamic interactions among the internal components of aero-engine main shaft bearings under unsteady-state conditions are intricate, involving clearance collisions, contact, friction, and lubrication. The dynamic characteristics of bearings significantly influence the performance and stability of mechanical systems.
Haisheng Yang, Qiang Liu, Si’er Deng
openaire   +2 more sources