Prediction of Interlobe Leakages in Screw Compressors

The clearance gaps in twin-screw compressors are critical for their performance and reliable operation, as the leakage flows through these clearances influence the volumetric and adiabatic efficiencies. The amount of leakage flows depends on the clearance size and shape as well as various geometric...

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Autores principales:	H. H. Patel, V. J. Lakhera
Formato:	article
Lenguaje:	EN
Publicado:	Isfahan University of Technology 2021
Materias:	interlobe clearance; nozzle equations; flow coefficients; leakage flow; compressor. Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/b343d67a304f4f31ac6437e76c790100
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id	oai:doaj.org-article:b343d67a304f4f31ac6437e76c790100
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spelling	oai:doaj.org-article:b343d67a304f4f31ac6437e76c7901002021-11-13T07:03:05ZPrediction of Interlobe Leakages in Screw Compressors1735-3572https://doaj.org/article/b343d67a304f4f31ac6437e76c7901002021-01-01T00:00:00Zhttp://jafmonline.net/JournalArchive/download?file_ID=57340&issue_ID=1015https://doaj.org/toc/1735-3572The clearance gaps in twin-screw compressors are critical for their performance and reliable operation, as the leakage flows through these clearances influence the volumetric and adiabatic efficiencies. The amount of leakage flows depends on the clearance size and shape as well as various geometric and operating parameters. Usually, the isentropic nozzle equations along with appropriate flow coefficients are used for more accurate estimation of the leakage flow rates through the clearance gaps. Hence, a proper understanding of the flow coefficients and their relationship with the dimensionless parameters (such as pressure ratio, Reynolds number, and aspect ratios) is critical for an accurate prediction of the leakage flows. In the present study, considering the interlobe clearance gap in screw compressor in terms of rectangular openings, the interlobe leakage flow rates are estimated for various opening sizes and pressure conditions using isentropic nozzle equations and an iterative method. The flow coefficients are determined by comparing the experimental values obtained using a specialized test rig and the flow rates obtained from the analytical methods. The dimensionless parameters are varied to see their individual effect on the leakage mass flow rates and on the flow coefficients. The mean deviation from the experimental results when using an analytical iterative procedure (-8.5%) is substantially lower in comparison to the mean deviation (+26.8%) using the isentropic nozzle equations. The study validates that the iterative method can be preferred (for an interlobe leakage flow rate prediction) over the isentropic nozzle equation method.H. H. PatelV. J. LakheraIsfahan University of Technology articleinterlobe clearance; nozzle equations; flow coefficients; leakage flow; compressor.Mechanical engineering and machineryTJ1-1570ENJournal of Applied Fluid Mechanics, Vol 14, Iss 6, Pp 1881-1891 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	interlobe clearance; nozzle equations; flow coefficients; leakage flow; compressor. Mechanical engineering and machinery TJ1-1570
spellingShingle	interlobe clearance; nozzle equations; flow coefficients; leakage flow; compressor. Mechanical engineering and machinery TJ1-1570 H. H. Patel V. J. Lakhera Prediction of Interlobe Leakages in Screw Compressors
description	The clearance gaps in twin-screw compressors are critical for their performance and reliable operation, as the leakage flows through these clearances influence the volumetric and adiabatic efficiencies. The amount of leakage flows depends on the clearance size and shape as well as various geometric and operating parameters. Usually, the isentropic nozzle equations along with appropriate flow coefficients are used for more accurate estimation of the leakage flow rates through the clearance gaps. Hence, a proper understanding of the flow coefficients and their relationship with the dimensionless parameters (such as pressure ratio, Reynolds number, and aspect ratios) is critical for an accurate prediction of the leakage flows. In the present study, considering the interlobe clearance gap in screw compressor in terms of rectangular openings, the interlobe leakage flow rates are estimated for various opening sizes and pressure conditions using isentropic nozzle equations and an iterative method. The flow coefficients are determined by comparing the experimental values obtained using a specialized test rig and the flow rates obtained from the analytical methods. The dimensionless parameters are varied to see their individual effect on the leakage mass flow rates and on the flow coefficients. The mean deviation from the experimental results when using an analytical iterative procedure (-8.5%) is substantially lower in comparison to the mean deviation (+26.8%) using the isentropic nozzle equations. The study validates that the iterative method can be preferred (for an interlobe leakage flow rate prediction) over the isentropic nozzle equation method.
format	article
author	H. H. Patel V. J. Lakhera
author_facet	H. H. Patel V. J. Lakhera
author_sort	H. H. Patel
title	Prediction of Interlobe Leakages in Screw Compressors
title_short	Prediction of Interlobe Leakages in Screw Compressors
title_full	Prediction of Interlobe Leakages in Screw Compressors
title_fullStr	Prediction of Interlobe Leakages in Screw Compressors
title_full_unstemmed	Prediction of Interlobe Leakages in Screw Compressors
title_sort	prediction of interlobe leakages in screw compressors
publisher	Isfahan University of Technology
publishDate	2021
url	https://doaj.org/article/b343d67a304f4f31ac6437e76c790100
work_keys_str_mv	AT hhpatel predictionofinterlobeleakagesinscrewcompressors AT vjlakhera predictionofinterlobeleakagesinscrewcompressors
_version_	1718430276151934976

Prediction of Interlobe Leakages in Screw Compressors

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