Results 41 to 50 of about 117 (105)

Research on the Applicability of Hybrid RANS/LES Models to Predict the Flow Behavior in Bulb Tubular Pump Under Rated and Stall Conditions

Energy Science &Engineering, Volume 13, Issue 3, Page 1184-1204, March 2025.
ABSTRACT The investigation into the internal flow characteristics of the bulb tubular pump device has important practical significance for improving both optimal design and operation stability. This paper uses different RANS/LES turbulence models to conduct numerical simulation research on the bulb tubular pump model device, specifically focusing on ...
Longyue Sun, Qiang Pan, Linlin Geng, Desheng Zhang, Xavier Escaler   +4 more
wiley   +1 more source

Study on the Dynamic Structure and Unsteady Characteristics of Vortex Flow for Blade Tip Clearance Leakage of a Single-vane Spiral Centrifugal Pump [PDF]

Journal of Applied Fluid Mechanics
Numerical simulations based on the RANS equations and the SST k‑ω turbulence model were carried out to study the turbulence characteristics in the tip clearance region of a spiral centrifugal pump.
W. Cao, J. Tang
doaj   +1 more source

Identification of the vortex in the main flow passage of a multiphase pump and the relationship with pressure fluctuation

Energy Science &Engineering, Volume 12, Issue 10, Page 4394-4413, October 2024.
This study develops a method of identifying vortices in the impeller channel of the multiphase pump, and reveals the intrinsic connection between the vortices and pressure fluctuations in the main flow passage. These findings offer some suggestions for eliminating the influence of vortices and enhancing the pressurizing capabilities of multiphase pumps.
Guangtai Shi, Manqi Tang, Wenjuan Lv, Xiaodong Peng, Hui Quan   +4 more
wiley   +1 more source

Application and parameter identification of the Lagrangian‐averaged vorticity deviation vortex detection method in three‐dimensional flows around solid bodies

Proceedings in Applied Mathematics and Mechanics, Volume 24, Issue 2, August 2024.
Abstract The main aim of the current study is the detection of vortices in three‐dimensional fluid flow around a circular cylinder and an axial fan with the Lagrangian‐averaged vorticity deviation vortex identification method. Important parameters of the method include the size of the sought vortices and their convexity.
Kinga Andrea Kovács, Esztella Balla
wiley   +1 more source

Review of Kelvin-Helmholtz Instability and Vortex Breakdown in Tip Leakage Vortex

Applied Sciences
With the rapid development of renewable energy, pumped storage power plants have taken on critical functions such as frequency regulation and grid stabilization.
Hongjuan Ran, Leanna Badger, Calvin Clawson, Neil Jarvis, Kate Hatch   +4 more
doaj   +1 more source

Study on the Suppression of Tip Leakage Vortex in Axial Flow Pumps Based on Circumferential Grooving in the Rotor Chamber

Journal of Marine Science and Engineering
The stability of axial flow pumps is significantly affected by the tip leakage vortex (TLV), which is generated through the entrainment of the main flow.
Haoran Wu, Desheng Zhang, Xi Shen, Chen Ni, Gang Yang   +4 more
doaj   +1 more source

Effects of Inlet Tip Clearance on Internal Flow Characteristic and Aerodynamic Performance of Centrifugal Compressor [PDF]

Journal of Applied Fluid Mechanics
In this study, numerical simulations of centrifugal compressors are carried out using ANSYS-CFX software. The focus lies in investigating the impact of the inlet tip-clearance (ITC) on the characteristics of the internal complex flow and the aerodynamic ...
Y. Zhang, J. Chen, Y. Shu, Z. Wang, H. Yang, Y. Wei   +5 more
doaj   +1 more source

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

Energy Science &Engineering, Volume 12, Issue 7, Page 3088-3109, July 2024.
This article uses pulsation tracking network (PTN) to track the four interfaces of the simulation model of a vertical guide vane mixed flow pump, perform VMD decomposition on pressure pulsation data and analyze the distribution pattern of pressure pulsation. Understand the variation law of dynamic and static interference between the number of impellers
Chenhan Su, Jiahao Lu, Ran Tao, Di Zhu, Ruofu Xiao   +4 more
wiley   +1 more source

Analysis of Different POD Processing Methods for SPIV-Measurements in Compressor Cascade Tip Leakage Flow

Energies, 2019
Though the proper orthogonal decomposition (POD) method has been widely adopted in flow analysis, few publications have systematically studied the influence of different POD processing methods on the POD results.
Lei Shi, Hongwei Ma, Lixiang Wang
doaj   +1 more source

Visualized observations of trajectory and dynamics of unsteady tip cloud cavitating vortices in axial flow pump

Journal of Fluid Science and Technology, 2017
A large-scale perpendicular cavitating vortices (PCVs), at the trailing edge of attached cavitation on the blade suction side near the tip region, has been found recently due to the great impact on performance breakdown in an axial waterjet pump. However,
Lei SHI, Desheng ZHANG, Ruijie ZHAO, Weidong SHI, B.P.M. (Bart) van ESCH   +4 more
doaj   +1 more source