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Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor

Casing pressure measurements and Stereoscopic Particle-Image Velocimetry (SPIV) measurements are used together to characterize the behavior of the rotor tip leakage flow at both the design and near-stall conditions in a low-speed multistage axial compressor. A three-dimensional Navier-Stokes solver...

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Autores principales: Li, Jun, Hu, Jun, Zhang, Chenkai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10451046/
https://www.ncbi.nlm.nih.gov/pubmed/32936051
http://dx.doi.org/10.1177/0036850420951070
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author Li, Jun
Hu, Jun
Zhang, Chenkai
author_facet Li, Jun
Hu, Jun
Zhang, Chenkai
author_sort Li, Jun
collection PubMed
description Casing pressure measurements and Stereoscopic Particle-Image Velocimetry (SPIV) measurements are used together to characterize the behavior of the rotor tip leakage flow at both the design and near-stall conditions in a low-speed multistage axial compressor. A three-dimensional Navier-Stokes solver is also performed for the multistage compressor and the prediction of tip leakage flow is compared with SPIV data and casing dynamic static pressure data. During the experiment 10 high-frequency Kulite transducers are mounted in the outer casing of the rotor 3 to investigate the complex flow near the compressor casing and Fourier analyses of the dynamic static pressure on the casing of the rotor 3 are carried out to investigate the tip leakage flow characteristics. At the same time, the two CCD cameras are arranged at the same side of the laser light sheet, which is suitable for investigating unsteady tip leakage flow in the multistage axial compressor. The SPIV measurements identify that the tip leakage flow exists in the rotor passage. The influence of tip leakage flow leads to the existence of low axial velocity region in the rotor passage and the alternating regions of positive and negative radial velocity indicates the emergence of tip leakage vortex (TLV). The trajectory of the tip leakage vortex moves from the suction surface toward the pressure surface of adjacent blade, which is aligned close to the rotor at the design point (DP). However, the tip leakage vortex becomes unstable and breaks down at the near-stall point (NS), making the vortex trajectory move upstream in the rotor passage and causing a large blockage in the middle of the passage.
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spelling pubmed-104510462023-08-26 Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor Li, Jun Hu, Jun Zhang, Chenkai Sci Prog Original Manuscript Casing pressure measurements and Stereoscopic Particle-Image Velocimetry (SPIV) measurements are used together to characterize the behavior of the rotor tip leakage flow at both the design and near-stall conditions in a low-speed multistage axial compressor. A three-dimensional Navier-Stokes solver is also performed for the multistage compressor and the prediction of tip leakage flow is compared with SPIV data and casing dynamic static pressure data. During the experiment 10 high-frequency Kulite transducers are mounted in the outer casing of the rotor 3 to investigate the complex flow near the compressor casing and Fourier analyses of the dynamic static pressure on the casing of the rotor 3 are carried out to investigate the tip leakage flow characteristics. At the same time, the two CCD cameras are arranged at the same side of the laser light sheet, which is suitable for investigating unsteady tip leakage flow in the multistage axial compressor. The SPIV measurements identify that the tip leakage flow exists in the rotor passage. The influence of tip leakage flow leads to the existence of low axial velocity region in the rotor passage and the alternating regions of positive and negative radial velocity indicates the emergence of tip leakage vortex (TLV). The trajectory of the tip leakage vortex moves from the suction surface toward the pressure surface of adjacent blade, which is aligned close to the rotor at the design point (DP). However, the tip leakage vortex becomes unstable and breaks down at the near-stall point (NS), making the vortex trajectory move upstream in the rotor passage and causing a large blockage in the middle of the passage. SAGE Publications 2020-09-16 /pmc/articles/PMC10451046/ /pubmed/32936051 http://dx.doi.org/10.1177/0036850420951070 Text en © The Author(s) 2020 https://creativecommons.org/licenses/by-nc/4.0/This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Original Manuscript
Li, Jun
Hu, Jun
Zhang, Chenkai
Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor
title Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor
title_full Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor
title_fullStr Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor
title_full_unstemmed Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor
title_short Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor
title_sort experimental investigation of the tip leakage flow in a low-speed multistage axial compressor
topic Original Manuscript
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10451046/
https://www.ncbi.nlm.nih.gov/pubmed/32936051
http://dx.doi.org/10.1177/0036850420951070
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