Results 11 to 20 of about 16,744 (167)

The correlation of the pulsations of flow in the settling chamber with the pulsations of supersonic flow

Journal of Physics: Conference Series, 2019
Abstract The relationship of the pulsations of flow in the settling chamber with the pulsations of supersonic flow in the test section of the T-325 wind tunnel of ITAM SB RAS was investigated. Experimental data on the correlation between flow pulsations in different sections of wind tunnel and efficiency of turbulence reducing system ...
L V Afanasev, V L Kocharin, A A Yatskikh, A D Kosinov, N V Semionov, Yu G Yermolaev, G L Kolosov   +6 more
openaire   +1 more source

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

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

A Study of the Pulsations of Flow in the Settling Chamber and Their Relationship with the Pulsations of the Supersonic Flow

Siberian Journal of Physics, 2019
Experimental study of the influence of flow pulsation in settling chamber on the supersonic free stream disturbances was carried out. Data on the pulsations in the settling chamber and the efficiency of deturbulization system as well as the correlation of pulsations of the flow of settling chamber and flow pulsations in test section of T-325 supersonic
L. V. Afanasev, A. A. Yatskih, A. D. Kosinov, Yu. G. Yermolaev, N. V. Semionov, O. P. Minin, S. G. Shevelkov   +6 more
openaire   +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

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

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

Pulsating Flow and Platelet Aggregation [PDF]

, 2005
Platelet aggregation has been modelled as a nonlinear system of viscous flow and pulsating flow based on the Fogelson’s continuum model. By solving nonlinear governing equations and the coupling between flow and platelet aggregates in the cylindrical coordinates using the finite element method, we can see how the platelet aggregation forms under the ...
openaire   +1 more source

Unsteady Pressure Pulsations in Pumps—A Review

Energies, 2022
Unsteady pressure-pulsation-induced severe vibration and high alternating stress can cause some unexpected results, including impeller crack and structural damage of the entire pumping system.
Ning Zhang, Delin Li, Bo Gao, Dan Ni, Zhong Li   +4 more
doaj   +1 more source