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Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump

Inlet flow direction significantly affects the hydraulic performance of an axial-flow pump. Usually, the research papers ignore this phenomenon, resulting in discrepancies between simulation and experimental results. This study examines the influence of inflow direction in five cases (0%, 5%, 10%, 1...

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Autores principales: Nguyen, Duc-Anh, Ma, Sang-Bum, Kim, Sung, Kim, Jin-Hyuk
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9977862/
https://www.ncbi.nlm.nih.gov/pubmed/36859554
http://dx.doi.org/10.1038/s41598-023-30511-4
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author Nguyen, Duc-Anh
Ma, Sang-Bum
Kim, Sung
Kim, Jin-Hyuk
author_facet Nguyen, Duc-Anh
Ma, Sang-Bum
Kim, Sung
Kim, Jin-Hyuk
author_sort Nguyen, Duc-Anh
collection PubMed
description Inlet flow direction significantly affects the hydraulic performance of an axial-flow pump. Usually, the research papers ignore this phenomenon, resulting in discrepancies between simulation and experimental results. This study examines the influence of inflow direction in five cases (0%, 5%, 10%, 15%, and 30% pre-swirl intensities) to determine the relationship between the pre-swirl intensity and the hydraulic performance of the axial-flow pump. Based on this, changing the setting angle of the inlet guide vane (IGV) is proposed and thoroughly investigated to reduce the effect of inflow direction. In this study, the influence of clearances in IGV blades on hydraulic performance is also investigated in detail. Numerical simulations are performed using ANSYS–CFX and a shear stress transport reattachment modification (SST k-[Formula: see text] ) turbulence model with small y+ values at all walls. Specifically, the hydraulic performance curves and internal flow characteristics, including contours and streamlines, are assessed and analyzed. The inflow direction significantly impacts the hydraulic efficiency of the axial-flow pump. Increased pre-swirl intensity causes more loss in the IGV passage. The internal flow field and performance are not affected by the clearance at the hub and shroud of the IGV. However, the tip clearance of the impeller causes a decrease in hydraulic efficiency due to the tip leakage vortex. By adjusting the setting angle of the IGV, the efficiency and head gradually increase from a negative to a positive setting angle. Additionally, 30° is considered the critical setting angle for IGV.
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spelling pubmed-99778622023-03-03 Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump Nguyen, Duc-Anh Ma, Sang-Bum Kim, Sung Kim, Jin-Hyuk Sci Rep Article Inlet flow direction significantly affects the hydraulic performance of an axial-flow pump. Usually, the research papers ignore this phenomenon, resulting in discrepancies between simulation and experimental results. This study examines the influence of inflow direction in five cases (0%, 5%, 10%, 15%, and 30% pre-swirl intensities) to determine the relationship between the pre-swirl intensity and the hydraulic performance of the axial-flow pump. Based on this, changing the setting angle of the inlet guide vane (IGV) is proposed and thoroughly investigated to reduce the effect of inflow direction. In this study, the influence of clearances in IGV blades on hydraulic performance is also investigated in detail. Numerical simulations are performed using ANSYS–CFX and a shear stress transport reattachment modification (SST k-[Formula: see text] ) turbulence model with small y+ values at all walls. Specifically, the hydraulic performance curves and internal flow characteristics, including contours and streamlines, are assessed and analyzed. The inflow direction significantly impacts the hydraulic efficiency of the axial-flow pump. Increased pre-swirl intensity causes more loss in the IGV passage. The internal flow field and performance are not affected by the clearance at the hub and shroud of the IGV. However, the tip clearance of the impeller causes a decrease in hydraulic efficiency due to the tip leakage vortex. By adjusting the setting angle of the IGV, the efficiency and head gradually increase from a negative to a positive setting angle. Additionally, 30° is considered the critical setting angle for IGV. Nature Publishing Group UK 2023-03-01 /pmc/articles/PMC9977862/ /pubmed/36859554 http://dx.doi.org/10.1038/s41598-023-30511-4 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Nguyen, Duc-Anh
Ma, Sang-Bum
Kim, Sung
Kim, Jin-Hyuk
Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump
title Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump
title_full Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump
title_fullStr Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump
title_full_unstemmed Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump
title_short Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump
title_sort influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9977862/
https://www.ncbi.nlm.nih.gov/pubmed/36859554
http://dx.doi.org/10.1038/s41598-023-30511-4
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