Performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio

In many respects, the efficiency and economy of the aircraft are determined by the parameters and characteristics of the power plant. The analysis of trends in the world engine building shows that an increase in the bypass ratio can significantly increase the efficiency of engines. One of the possib...

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Autor principal:	Олеся Валеріївна Денисюк
Formato:	article
Lenguaje:	EN RU UK
Publicado:	National Aerospace University «Kharkiv Aviation Institute» 2021
Materias:	закапатований гвинтовентилятор надвисока ступінь двоконтурності відкритий гвинтовентилятор приріст сили тяги чисельний експеримент моделювання течії перспективний двигун Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doaj.org/article/672e16d849c5403d99cd66aa98495854
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id	oai:doaj.org-article:672e16d849c5403d99cd66aa98495854
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spelling	oai:doaj.org-article:672e16d849c5403d99cd66aa984958542021-11-09T07:53:09ZPerformance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio1727-73372663-221710.32620/aktt.2021.4sup1.06https://doaj.org/article/672e16d849c5403d99cd66aa984958542021-08-01T00:00:00Zhttp://nti.khai.edu/ojs/index.php/aktt/article/view/1451https://doaj.org/toc/1727-7337https://doaj.org/toc/2663-2217In many respects, the efficiency and economy of the aircraft are determined by the parameters and characteristics of the power plant. The analysis of trends in the world engine building shows that an increase in the bypass ratio can significantly increase the efficiency of engines. One of the possible technical solutions to ensure the high performance of the perspective engines with an ultra-high bypass ratio is the use of a ducted propeller or propfan. This solution allows you to reduce acoustic radiation. In addition, the main advantage of the ducted propfans is a certain increase in thrust for the same consumed power. When flowing around a ducted propfan, a significant suction force arises on the nose of the profiled ring, the projection of which on the direction of movement provides a positive thrust of the ring. The presence of a duct also leads to a decrease in the final loss of the propeller, which, in turn, leads to an increase in the efficiency of the engine. Ducted and unducted propfans with the same blade row are investigated to assess the characteristics of a ducted propfan. The researches were carried out by the method of numerical experiment. The object of the research is a propfan with an inlet diameter of 2.924 m and the number of blades of 14 for a turbofan engine with a bypass ratio of m = 30. To research the propfan characteristics, a cruising mode of operation was selected in the range of revolutions n = 1500 ... 1650 rpm. with Mach numbers at the input from M = 0.54 to M = 0.8. In this work, the calculation did not take into account the resistance force of the duct. For a qualitative assessment of the flow in the propfan, visualization of the flow lines in the ducted and unducted propfan was obtained. The analysis of the research results showed that for all modes of operation the ducted propfan has a thrust force higher than the unducted propfan. The increase in thrust load reaches 71 ... 76 %. Visualization of the flow lines when flowing around a ducted and unducted propfan showed that the presence of a duct improves the internal aerodynamics of the propfan.Олеся Валеріївна ДенисюкNational Aerospace University «Kharkiv Aviation Institute»articleзакапатований гвинтовентиляторнадвисока ступінь двоконтурностівідкритий гвинтовентиляторприріст сили тягичисельний експериментмоделювання течіїперспективний двигунMotor vehicles. Aeronautics. AstronauticsTL1-4050ENRUUKАвіаційно-космічна техніка та технологія, Vol 0, Iss 4sup1, Pp 41-46 (2021)
institution	DOAJ
collection	DOAJ
language	EN RU UK
topic	закапатований гвинтовентилятор надвисока ступінь двоконтурності відкритий гвинтовентилятор приріст сили тяги чисельний експеримент моделювання течії перспективний двигун Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	закапатований гвинтовентилятор надвисока ступінь двоконтурності відкритий гвинтовентилятор приріст сили тяги чисельний експеримент моделювання течії перспективний двигун Motor vehicles. Aeronautics. Astronautics TL1-4050 Олеся Валеріївна Денисюк Performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio
description	In many respects, the efficiency and economy of the aircraft are determined by the parameters and characteristics of the power plant. The analysis of trends in the world engine building shows that an increase in the bypass ratio can significantly increase the efficiency of engines. One of the possible technical solutions to ensure the high performance of the perspective engines with an ultra-high bypass ratio is the use of a ducted propeller or propfan. This solution allows you to reduce acoustic radiation. In addition, the main advantage of the ducted propfans is a certain increase in thrust for the same consumed power. When flowing around a ducted propfan, a significant suction force arises on the nose of the profiled ring, the projection of which on the direction of movement provides a positive thrust of the ring. The presence of a duct also leads to a decrease in the final loss of the propeller, which, in turn, leads to an increase in the efficiency of the engine. Ducted and unducted propfans with the same blade row are investigated to assess the characteristics of a ducted propfan. The researches were carried out by the method of numerical experiment. The object of the research is a propfan with an inlet diameter of 2.924 m and the number of blades of 14 for a turbofan engine with a bypass ratio of m = 30. To research the propfan characteristics, a cruising mode of operation was selected in the range of revolutions n = 1500 ... 1650 rpm. with Mach numbers at the input from M = 0.54 to M = 0.8. In this work, the calculation did not take into account the resistance force of the duct. For a qualitative assessment of the flow in the propfan, visualization of the flow lines in the ducted and unducted propfan was obtained. The analysis of the research results showed that for all modes of operation the ducted propfan has a thrust force higher than the unducted propfan. The increase in thrust load reaches 71 ... 76 %. Visualization of the flow lines when flowing around a ducted and unducted propfan showed that the presence of a duct improves the internal aerodynamics of the propfan.
format	article
author	Олеся Валеріївна Денисюк
author_facet	Олеся Валеріївна Денисюк
author_sort	Олеся Валеріївна Денисюк
title	Performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio
title_short	Performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio
title_full	Performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio
title_fullStr	Performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio
title_full_unstemmed	Performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio
title_sort	performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio
publisher	National Aerospace University «Kharkiv Aviation Institute»
publishDate	2021
url	https://doaj.org/article/672e16d849c5403d99cd66aa98495854
work_keys_str_mv	AT olesâvaleríívnadenisûk performanceassessmentoftheductedpropfanoftheturbofanenginewithultrahighbypassratio
_version_	1718441203792347136

Performance assessment of the ducted propfan of the turbofan engine with ultra-high bypass ratio

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