Results 11 to 20 of about 50,864 (305)

Experimental investigation of pressure pulsation induced by the floor-attached vortex in an axial flow pump

Advances in Mechanical Engineering, 2019
The pressure pulsation test in an axial flow pump with and without the floor-attached vortex was performed. Pressure sensors were mounted on the impeller inlet section and impeller outlet section and guide vane section outlet of the axial flow pump.
Xijie Song, Chao Liu
doaj   +2 more sources

Stability Analysis of Vaneless Space in High-Head Pump-Turbine under Turbine Mode: Computational Fluid Dynamics Simulation and Particle Imaging Velocimetry Measurement

Machines, 2022
When the Francis-type reversible pump-turbine runs under partial load, the pressure pulsation amplitude and frequency in vaneless space are high, posing a serious threat to the stability of unit operation.
Wanquan Deng, Lianchen Xu, Zhen Li, Wen Tang, Xiaolong Wang, Linmin Shang, Demin Liu, Xiaobing Liu   +7 more
doaj   +1 more source

Pulsating flow and convective heat transfer in a cavity with inlet and outlet sections [PDF]

, 2009
This paper deals with the study of 2-D, laminar, pulsating flow inside a heated rectangular cavity with different aspect ratios. The cooling liquid (water with temperature dependent viscosity and thermal conductivity) comes and leaves the cavity via ...
A. Velazquez, Akhavan, Akhavan, Angeli, Chattopadhyay, Chung, Das, Guo, Ha, Hino, Incropera, J.L. Montanes, J.R. Arias, Kalabin, Kim, Lee, Leung Ki, Lin, Mahapatra, Masuda, Mendez, Saeidi, Saeidi, Shuja, Singh, Tannehill, Tasnim, Velázquez, Verboven, Yu   +29 more
core   +2 more sources

Influence of Different Reflux Groove Structures on the Flow Characteristics of the Roots Pump

Machines, 2022
A Roots pump often exhibits the typical characteristics of high gas pressure in the exhaust port, low pressure at a basic volume and large airflow pulsation at the outlet as a result of gas reflux.
Wenshuai Xing, Fan Zhang, Feifei Zhao, Jialong Song, Xiumei Zhu, Xingpeng Tang   +5 more
doaj   +1 more source

Experimental Investigation on the Effect of the Staggered Impeller on the Unsteady Pressure Pulsations Characteristic in a Pump

Energies, 2022
High−energy pressure pulsation induced by rotor−stator interaction (RSI) is the primary source of flow−induced vibration noise in the pump, affecting the pump’s stability and system operation. In order to find an effective method to suppress the pressure
Dan Ni, Feifan Wang, Bo Gao, Yang Zhang, Shiyuan Huang   +4 more
doaj   +1 more source

LES of additive and non-additive pulsatile flows in a model arterial stenosis [PDF]

, 2010
Transition of additive and non-additive pulsatile flows through a simple 3D model of arterial stenosis is investigated by using a large eddy simulation (LES) technique. We find in both the pulsatile cases that the interaction of the two shear layers, one
Fung YC, Giles Roditi, M. Mamun Molla, Manosh C. Paul, Pedley TJ, Pedley TJ   +5 more
core   +1 more source

A Study on the Cavitation and Pressure Pulsation Characteristics in the Impeller of an LNG Submerged Pump

Machines, 2021
Based on CFD analysis technology, this paper studies the cavitation performance of an LNG submerged pump and the pressure pulsation characteristics under cavitation excitation.
Wei Li, Shuo Li, Leilei Ji, Xiaofan Zhao, Weidong Shi, Ramesh K. Agarwal, Muhammad Awais, Yang Yang   +7 more
doaj   +1 more source

Numerical Study of Bubble Rising and Coalescence Characteristics under Flow Pulsation Based on Particle Method

Science and Technology of Nuclear Installations, 2019
Two-phase flow instability may occur in nuclear reactor systems, which is often accompanied by periodic fluctuation in fluid flow rate. In this study, bubble rising and coalescence characteristics under inlet flow pulsation condition are analyzed based ...
Ronghua Chen, Minghao Zhang, Kailun Guo, Dawei Zhao, Wenxi Tian, Guanghui Su, Suizheng Qiu   +6 more
doaj   +1 more source

Local Heat Transfer Dynamics in the In-Line Tube Bundle under Asymmetrical Pulsating Flow

Energies, 2022
The pulsating flow is one of the techniques that can enhance heat transfer, therefore leading to energy saving in tubular heat exchangers. This paper investigated the heat transfer and flow characteristics in a two-dimensional in-line tube bundle with ...
Aigul Haibullina, Aidar Khairullin, Denis Balzamov, Vladimir Ilyin, Veronika Bronskaya, Liliya Khairullina   +5 more
doaj   +1 more source

Functional Morphology and Fluid Interactions During Early Development of the Scyphomedusa Aurelia aurita [PDF]

, 2009
Scyphomedusae undergo a predictable ontogenetic transition from a conserved, universal larval form to a diverse array of adult morphologies. This transition entails a change in bell morphology from a highly discontinuous ephyral form, with deep clefts ...
Colin, S. P., Costello, J. H., Dabiri, J. O., Feitl, K. E., Millett, A. F.   +4 more
core   +2 more sources