Research and Application of Fluid Machinery

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 986

Special Issue Editors


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Guest Editor
School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: cavitating flow; hydraulic machinery

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Guest Editor
School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan 430072, China
Interests: cavitating flow in fluid machinery

Special Issue Information

Dear Colleagues,

Fluid machinery is a device that converts the energy stored by a fluid into mechanical energy or vice versa. It is a kind of widely used machine and has great action in all fields of the national economy. The research and application of fluid machinery is an active field of research with many unsolved or partially solved problems in science and engineering. Based on this, many studies on the experimental techniques, theoretical models, and simulation calculations of the Multiphysics coupling characteristics of fluid machinery have been conducted to improve the performance of fluid machinery. This Special Issue aims to publish state-of-the-art studies that gather current knowledge and pressing questions regarding fluid machinery.

For this Special Issue, we invite novel contributions in the form of critical reviews and research papers to address all key aspects of Fluid Machinery, including but not limited to the following:

  • experimental techniques of fluid machinery;
  • theoretical models and simulation calculations;
  • design Method, control technique, and engineering application of fluid machinery;
  • optimal design of fluid machinery;
  • complex flow in fluid machinery;
  • diagnostic analysis of fluid machinery.

Dr. Tairan Chen
Dr. Huaiyu Cheng
Guest Editors

Manuscript Submission Information

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Keywords

  • experimental techniques
  • theoretical models
  • simulation calculations
  • design method
  • control technique
  • optimal design
  • complex flow
  • diagnostic analysis

Published Papers (1 paper)

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Research

19 pages, 9240 KiB  
Article
Skin-Friction Coefficient Model Verification and Flow Characteristics Analysis in Disk-Type Gap for Radial Turbomachinery
by Zhuobin Zhao, Qinghua Deng, Lehao Hu, Jun Li and Zhenping Feng
Appl. Sci. 2023, 13(18), 10354; https://doi.org/10.3390/app131810354 - 15 Sep 2023
Viewed by 646
Abstract
Under the conditions of high speed and density flow, the windage loss in the gap behind an impeller has an important influence on its thermal power conversion efficiency. Daily and Nece took the relative gap and Reynolds number as the characteristic parameters and [...] Read more.
Under the conditions of high speed and density flow, the windage loss in the gap behind an impeller has an important influence on its thermal power conversion efficiency. Daily and Nece took the relative gap and Reynolds number as the characteristic parameters and divided the flow of a rotating disk in a closed chamber into four flow regions through laminar flow, turbulent flow and state of boundary layers. In this paper, the skin-friction coefficient model of Regio III and IV was verified by a numerical method under conditions corresponding to the typical Reynolds number range for a radial impeller. The results show that when the relative gap increases, the relative deviation between the numerical calculation and the model prediction results decreases, and the maximum deviation is −12.4%. With the increase of Reynolds number, the Region IV model is more accurate. Region III has the flow state of boundary layers merging and separation at the same time. Both models have good prediction accuracy with different mediums of air, water-liquid and critical CO2. The deviation in Region III is larger and shows a decreasing trend with respect to Region IV, Based on the two models, a method for predicting the optimal gap is proposed. The method is verified to be reliable and can minimize windage loss. Full article
(This article belongs to the Special Issue Research and Application of Fluid Machinery)
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