Off-line washing effectiveness on a multistage axial compressor

The interaction between gas turbines and airborne particles determines detrimental effects on the performance, efficiency, and reliability of the power unit. When it is possible, the interaction is reduced by the use of inlet separators and filtration systems. In an aero engine, these barriers are d...

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Autores principales:	Aldi Nicola, Casari Nicola, Fadiga Ettore, Friso Riccardo, Oliani Stefano, Pinelli Michele, Spina Pier Ruggero, Suman Alessio, Vulpio Alessandro, Zanini Nicola
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/e4113035339f43e5823b57f299c936f5
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id	oai:doaj.org-article:e4113035339f43e5823b57f299c936f5
record_format	dspace
spelling	oai:doaj.org-article:e4113035339f43e5823b57f299c936f52021-11-08T15:18:54ZOff-line washing effectiveness on a multistage axial compressor2267-124210.1051/e3sconf/202131211016https://doaj.org/article/e4113035339f43e5823b57f299c936f52021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/88/e3sconf_ati2021_11016.pdfhttps://doaj.org/toc/2267-1242The interaction between gas turbines and airborne particles determines detrimental effects on the performance, efficiency, and reliability of the power unit. When it is possible, the interaction is reduced by the use of inlet separators and filtration systems. In an aero engine, these barriers are difficult to implement, and only bigger particles (usually greater than 10 μm) are separated from the airflow. Small units, especially those equips helicopters, are usually affected by fouling issues, especially when the aircraft is employed in harsh environments such as firefighting and rescue activities. To recover this contamination, the unit is washed after the mission by ground operations to restore the unit performance by removing the deposits. This operation occurs during a sub-idle unit operation, and the washing process has to be effective when the engine operates in this off-design condition. In this paper, the evaluation of the washing performance during a sub-idle unit operation is carried out. The compressor unit is a multistage axial compressor that equips the Allison 250-C18 engine. The washing operation was performed by water, and a sensitivity analysis is carried out to discover the capability of water droplets to remove the contaminants. The experimental analysis involves the contamination of the unit by micro-sized soot particles and a washing operation by micro-sized water droplets. These experimental results are compared to numerical simulations to discover the effects of the washing operation on a small power unit during sub-idle operating conditions. The off-design regime imposes a specific evaluation of the proper setup of the washing strategy: flow separations involve wider regions in the compressor unit, and the removal capability is strongly related to the droplet path through the stages. The results show how in the off-design washing operation, the droplet diameter has greater importance than the water flow rate for reducing the deposits over the compressor stages.Aldi NicolaCasari NicolaFadiga EttoreFriso RiccardoOliani StefanoPinelli MicheleSpina Pier RuggeroSuman AlessioVulpio AlessandroZanini NicolaEDP SciencesarticleEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 312, p 11016 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Environmental sciences GE1-350
spellingShingle	Environmental sciences GE1-350 Aldi Nicola Casari Nicola Fadiga Ettore Friso Riccardo Oliani Stefano Pinelli Michele Spina Pier Ruggero Suman Alessio Vulpio Alessandro Zanini Nicola Off-line washing effectiveness on a multistage axial compressor
description	The interaction between gas turbines and airborne particles determines detrimental effects on the performance, efficiency, and reliability of the power unit. When it is possible, the interaction is reduced by the use of inlet separators and filtration systems. In an aero engine, these barriers are difficult to implement, and only bigger particles (usually greater than 10 μm) are separated from the airflow. Small units, especially those equips helicopters, are usually affected by fouling issues, especially when the aircraft is employed in harsh environments such as firefighting and rescue activities. To recover this contamination, the unit is washed after the mission by ground operations to restore the unit performance by removing the deposits. This operation occurs during a sub-idle unit operation, and the washing process has to be effective when the engine operates in this off-design condition. In this paper, the evaluation of the washing performance during a sub-idle unit operation is carried out. The compressor unit is a multistage axial compressor that equips the Allison 250-C18 engine. The washing operation was performed by water, and a sensitivity analysis is carried out to discover the capability of water droplets to remove the contaminants. The experimental analysis involves the contamination of the unit by micro-sized soot particles and a washing operation by micro-sized water droplets. These experimental results are compared to numerical simulations to discover the effects of the washing operation on a small power unit during sub-idle operating conditions. The off-design regime imposes a specific evaluation of the proper setup of the washing strategy: flow separations involve wider regions in the compressor unit, and the removal capability is strongly related to the droplet path through the stages. The results show how in the off-design washing operation, the droplet diameter has greater importance than the water flow rate for reducing the deposits over the compressor stages.
format	article
author	Aldi Nicola Casari Nicola Fadiga Ettore Friso Riccardo Oliani Stefano Pinelli Michele Spina Pier Ruggero Suman Alessio Vulpio Alessandro Zanini Nicola
author_facet	Aldi Nicola Casari Nicola Fadiga Ettore Friso Riccardo Oliani Stefano Pinelli Michele Spina Pier Ruggero Suman Alessio Vulpio Alessandro Zanini Nicola
author_sort	Aldi Nicola
title	Off-line washing effectiveness on a multistage axial compressor
title_short	Off-line washing effectiveness on a multistage axial compressor
title_full	Off-line washing effectiveness on a multistage axial compressor
title_fullStr	Off-line washing effectiveness on a multistage axial compressor
title_full_unstemmed	Off-line washing effectiveness on a multistage axial compressor
title_sort	off-line washing effectiveness on a multistage axial compressor
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/e4113035339f43e5823b57f299c936f5
work_keys_str_mv	AT aldinicola offlinewashingeffectivenessonamultistageaxialcompressor AT casarinicola offlinewashingeffectivenessonamultistageaxialcompressor AT fadigaettore offlinewashingeffectivenessonamultistageaxialcompressor AT frisoriccardo offlinewashingeffectivenessonamultistageaxialcompressor AT olianistefano offlinewashingeffectivenessonamultistageaxialcompressor AT pinellimichele offlinewashingeffectivenessonamultistageaxialcompressor AT spinapierruggero offlinewashingeffectivenessonamultistageaxialcompressor AT sumanalessio offlinewashingeffectivenessonamultistageaxialcompressor AT vulpioalessandro offlinewashingeffectivenessonamultistageaxialcompressor AT zanininicola offlinewashingeffectivenessonamultistageaxialcompressor
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Off-line washing effectiveness on a multistage axial compressor

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