Results 41 to 50 of about 16,744 (167)

Influence of Solid-Liquid Two-Phase Flow on Pressure Pulsation Characteristics in Axial Flow Pump Unit

Renmin Zhujiang
Based on Euler multiphase model, RNG k-ε turbulence model, and SIMPLEC algorithm, a numerical simulation of solid-liquid two-phase flow in an axial flow pump was carried out to study the pressure fluctuation characteristics of the axial flow pump when ...
GUO Chu, WANG Danna, ZHANG Tao, WU Yue, ZHENG Yuan   +4 more
doaj   +2 more sources

Analysis of the temporal, spatial, and frequency law of the internal flow in a prototype vaned mixed‐flow pump

Energy Science & Engineering
Mixed‐flow pump is a typical pump using in low‐head cases of water lifting. The flow field pulsation is usually an important issue in the operation of mixed‐flow pumps and their pumping statins.
Chenhan Su, Jiahao Lu, Ran Tao, Di Zhu, Ruofu Xiao   +4 more
doaj   +1 more source

OPTIMIZATION DESIGN OF INTERNAL GEAR PUMP BASED ON IMPROVED PARTICLE SWARM OPTIMIZATION

Jixie qiangdu, 2019
In order to reduce the flow pulsation of the inner meshing gear pump,taking PGH type involute internal gear pump as the research object,the mathematical model of flow pulsation rate and tooth profile parameters was established,and the instantaneous flow ...
SUN YuanJing, QI ZhiYuan, ZHAO GuoChao
doaj  

Research on Liquid Flow Pulsation Reduction in Microchannel of Pneumatic Microfluidic Chip Based on Membrane Microvalve

Fluids
The unsteady and discontinuous liquid flow in the microchannel affects the efficiency of sample mixing, molecular detection, target acquisition, and biochemical reaction.
Xuling Liu, Le Bo, Yusong Zhang, Chaofeng Peng, Kaiyi Zhang, Shaobo Jin, Guoyong Ye, Jinggan Shao   +7 more
doaj   +1 more source

Particle Resistance in Pulsation Flow

JAPANESE JOURNAL OF MULTIPHASE FLOW, 1991
The resistance coefficient of a particle was measured in a pumped flow with added pulsation from a piston crank mechanism. As a result of experiment, it was found that the resistance coefficient of the particle was increased by a remarkable 7Hz and was for the increased by 15Hz when the pulsation frequency of the pumping fluid was 0-25Hz.
SAKAMOTO, Sadao, KANAZAWA, Koji, KONDO, Toru   +2 more
openaire   +2 more sources

Increased pulsation ratio in rear quarters reduces machine-on time and milking on empty teats

Journal of Dairy Science
: Dairy cows usually store more milk in the rear quarters of the udder than the front quarters. With conventional machine milking, this leads to an earlier cessation of milk flow in front quarters than the rear quarters and hence unavoidable milking on ...
Patricia Fürst, Moritz Affentranger, Carl Oskar Paulrud, Rupert M. Bruckmaier   +3 more
doaj   +1 more source

A noninvasive and comprehensive method for continuous assessment of cerebral blood flow pulsation based on magnetic induction phase shift. [PDF]

PeerJ, 2022
Zeng L, Li G, Zhang M, Zhu R, Chen J, Li M, Yin S, Bai Z, Zhuang W, Sun J.   +9 more
europepmc   +1 more source

Optimization Design of the Structure of Internal Gear Pump with Four Idlers

Jixie chuandong, 2017
The radial force of annular gear and the flow pulsation is analyzed based on internal gear pump with four idlers. The model of the dual objective function is established with the minimum flow pulsation and the minimum volume of internal gear pump with ...
Zhang Jianghong, Wang Sixia
doaj  

Characterization of Pressure Pulsation Propagation in a Pump‐Turbine Based on the Same‐Frequency Tracking Method

Energy Science & Engineering
Pressure pulsation is a key factor affecting the safe and stable operation of pump‐turbines. This article is based on same frequency‐tracking method on the pressure pulsation propagation characteristics of pump‐turbine during generation mode.
Yanpin Li, Pengcheng Hao, Zichao Zhang, Lihong Zhang, Huayang Hai, Hengxiang Zhang, Xikun Wang, Jiarui Wang, Zipu Zhao, Peijie Peng   +9 more
doaj   +1 more source

Particles Heat Treating in a Pulsating Gas Stream

KONA Powder and Particle Journal, 2014
The subject of the paper is the application of pulsating flow to the particles heat treating. Pulsation influence mechanisms are segregated by the author into two groups: quasi – steady – state (when, at every point ...
Anatole Parnas
doaj   +1 more source