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Multiphase Flow and Vortex Dynamics in Fluid Machinery

Submission Deadline: 01 November 2024 (closed) View: 226

Guest Editors

Dr. Yonggang Lu, Associate professor, School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212000, China
Dr. Yonggang Lu is currently an associate professor at Jiangsu University and a post-doctoral at Tsinghua University. His Interests include multiphase flow inside fluid machinery, vortex dynamics inside fluid machinery, Cavitation and erosion, Fluid-structure interaction. He has undertaken research projects including National Natural Science Foundation of China, Natural Science Foundation of Jiangsu Province, etc, and published more than 50 academic papers and patent inventions.

Dr. Zhenwei Huang, Associate professor, School of Naval Architecture & Ocean Engineering, Huazhong University of Science and Technology University, Hubei, China
Dr. Zhenwei Huang got his Ph.D degree from Naval University of Engineering in 2016 and now is an associate professor in Huazhong University of Science and Technology. His research interest includes flow-induced pressure pulsations; vibration and noise control. He has undertaken several projects from the NSFC and published more than 20 academic papers.

Dr. Ning Zhang, Associate professor, School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212000, China
Dr. Ning Zhang got his Ph.D degree from Jiangsu university in 2016 and now is an associate professor in Jiangsu University. His research interest includes complex flow in pumps; flow-induced pressure pulsations; multiphase flow. Currently, he undertakes several projects from the NSFC and the pump industry major in the developing of high performance pump design.

Dr. Jingwei Cao, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Dr. Jingwei Cao received his PhD degree from Tsinghua University in 2023 and his interests include multi-field coupling, hydraulic machinery, pumped storage, ocean engineering. He has undertaken research projects including the National Natural Science Foundation of China, and more than 10  engineering research projects, including the bulb turbine, Francis turbine, Kaplan turbine, pump-turbine, rim-generator, etc. He has published 27 academic papers, including 20 SCI papers.

Dr. Xijie Song, Special professor, College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225000, China
Dr. Xijie Song got his Ph.D degree from Yangzhou University and now is a post-doctoral at Tsinghua University and a special professor in Yangzhou University. His Interest is multifield coupling theory of multiphase flow in fluid machinery. He has undertaken several projects from the NSFC, and published more than 40 academic papers and patent inventions.


Summary

By definition, a fluid machine is a device which converts the energy stored by a fluid into mechanical energy or vice versa. Relevant examples are pumps, water turbines and marine propellers. The flow associated with these units is often of a multiphase nature given the involvement of various fluids and materials (such as water, gases of different types and sand or other granular materials). In turn, these can give rise to a variety of behaviors, phenomena and related “working conditions”, which can seriously affect the safe and stable operation or exploitation of these systems. Relevant research is therefore still needed to promote the development of this specific field of engineering. Relevant scholars are invited to contribute to this Special Issue by submitting their recent work on the analysis of such multiphase flows and related “vortex dynamics”. In addition to the presence of different phases, indeed, the flow “vorticity” (being present as a result of the turbulent nature of the flow or due to other mechanical effects) is also expected to play a crucial role in fluid machinery. Relevant subjects include (but may not be limited to):

· Experimental and numerical investigations of multiphase flow in fluid machinery;

· Cavitation flow in hydraulic machinery

· Vortex dynamics in fluid machinery

· Vibration, noise, fatigue and damage analysis


In all cases, the submitted paper is expected to provide indications or recommendations for the design and optimization of these systems.


Keywords

pump turbine/ turbine/ pump/ marine propellers; Vortex; Multiphase flow; Cavitation; Erosion; Experimental measurement; Numerical simulation

Published Papers


  • Open Access

    ARTICLE

    Transient Analysis of a Reactor Coolant Pump Rotor Seizure Nuclear Accident

    Mengdong An, Weiyuan Zhong, Wei Xu, Xiuli Wang
    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.6, pp. 1331-1349, 2024, DOI:10.32604/fdmp.2023.046604
    (This article belongs to the Special Issue: Multiphase Flow and Vortex Dynamics in Fluid Machinery)
    Abstract The reactor coolant pump (RCP) rotor seizure accident is defined as a short-time seizure of the RCP rotor. This event typically leads to an abrupt flow decrease in the corresponding loop and an ensuing reactor and turbine trip. The significant reduction of core coolant flow while the reactor is being operated at full load can have very negative consequences. This potentially dangerous event is typically characterized by a complex transient behavior in terms of flow conditions and energy transformation, which need to be analyzed and understood. This study constructed transient flow and rotational speed mathematical More >

    Graphic Abstract

    Transient Analysis of a Reactor Coolant Pump Rotor Seizure Nuclear Accident

  • Open Access

    ARTICLE

    An Experimental Analysis of Gas-Liquid Flow Breakdown in a T-Junction

    Lihui Ma, Zhuo Han, Wei Li, Guangfeng Qi, Ran Cheng, Yuanyuan Wang, Xiangran Mi, Xiaohan Zhang, Yunfei Li
    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.6, pp. 1381-1392, 2024, DOI:10.32604/fdmp.2024.046405
    (This article belongs to the Special Issue: Multiphase Flow and Vortex Dynamics in Fluid Machinery)
    Abstract When a gas-liquid two-phase flow (GLTPF) enters a parallel separator through a T-junction, it generally splits unevenly. This phenomenon can seriously affect the operation efficiency and safety of the equipment located downstream. In order to investigate these aspects and, more specifically, the so-called bias phenomenon (all gas and liquid flowing to one pipe, while the other pipe is a liquid column that fluctuates up and down), laboratory experiments were carried out by using a T-junction connected to two parallel vertical pipes. Moreover, a GLTPF prediction model based on the principle of minimum potential energy was… More >

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