CFD study of the Effect of Piston Crevice Volume on the Temperature Distribution in a Rapid Compression Machine

One of the conditions for controlling the aerodynamic in the reaction chamber is designing a crevice volume on the surface of the piston head. The importance of the crevice volume is to contain the cool boundary layers generated as a resulting of the moving reactor piston. But this crevice volume co...

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Main Authors: Oku Ekpenyong Nyong, Celestine Ebieto, Ene Ekpo Bassey, Ikem Azorshubel Ikem
Format: Article
Language:English
Published: Society of Polish Mechanical Engineers and Technicians 2019-03-01
Series:Advances in Science and Technology Research Journal
Subjects:
CFD
Online Access:http://www.journalssystem.com/astrj/CFD-study-of-the-Effect-of-Piston-Crevice-Volume-on-the-Temperature-Distribution,103380,0,2.html
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spelling doaj-6e4937c7089349189f12035e0fc31b3b2020-11-25T01:51:37ZengSociety of Polish Mechanical Engineers and TechniciansAdvances in Science and Technology Research Journal2080-40752299-86242019-03-01131465110.12913/22998624/103380103380CFD study of the Effect of Piston Crevice Volume on the Temperature Distribution in a Rapid Compression MachineOku Ekpenyong Nyong0Celestine Ebieto1Ene Ekpo Bassey2Ikem Azorshubel Ikem3Cross River University of Technology, Calabar, NigeriaDepartment of Mechanical Engineering, University of Port Harcourt, NigeriaCross River University of Technology, Calabar, NigeriaCross River University of Technology, Calabar, NigeriaOne of the conditions for controlling the aerodynamic in the reaction chamber is designing a crevice volume on the surface of the piston head. The importance of the crevice volume is to contain the cool boundary layers generated as a resulting of the moving reactor piston. But this crevice volume consequently drops the end gas pressure and temperature at the end of the stroke. The CFD study of the aerodynamic effect of a piston movement in a reaction chamber is modelled using the commercial code of Ansys Fluent and assuming a 2-Dimensional computational moving mesh. A starting optimal crevice volume of 282 mm3 is used for further optimisation. This resulted in five crevice lengths of 3mm, 5mm, 7mm, 9mm and 12mm respectively. The crevice height of 5 mm was found to improve the compressed gas pressure at the end of the stroke to about 2 bar and temperature about 17.7 K and also maintained a uniform temperature field. While that of 12 mm had the least peak compressed gas pressure. This study investigates the possible means of improving the peak pressure and temperature drop in a rapid compression machine by further optimisation of the crevice volume.http://www.journalssystem.com/astrj/CFD-study-of-the-Effect-of-Piston-Crevice-Volume-on-the-Temperature-Distribution,103380,0,2.htmlCFDoptimisationrapid compression machinecrevice pistonpiston stroke
collection DOAJ
language English
format Article
sources DOAJ
author Oku Ekpenyong Nyong
Celestine Ebieto
Ene Ekpo Bassey
Ikem Azorshubel Ikem
spellingShingle Oku Ekpenyong Nyong
Celestine Ebieto
Ene Ekpo Bassey
Ikem Azorshubel Ikem
CFD study of the Effect of Piston Crevice Volume on the Temperature Distribution in a Rapid Compression Machine
Advances in Science and Technology Research Journal
CFD
optimisation
rapid compression machine
crevice piston
piston stroke
author_facet Oku Ekpenyong Nyong
Celestine Ebieto
Ene Ekpo Bassey
Ikem Azorshubel Ikem
author_sort Oku Ekpenyong Nyong
title CFD study of the Effect of Piston Crevice Volume on the Temperature Distribution in a Rapid Compression Machine
title_short CFD study of the Effect of Piston Crevice Volume on the Temperature Distribution in a Rapid Compression Machine
title_full CFD study of the Effect of Piston Crevice Volume on the Temperature Distribution in a Rapid Compression Machine
title_fullStr CFD study of the Effect of Piston Crevice Volume on the Temperature Distribution in a Rapid Compression Machine
title_full_unstemmed CFD study of the Effect of Piston Crevice Volume on the Temperature Distribution in a Rapid Compression Machine
title_sort cfd study of the effect of piston crevice volume on the temperature distribution in a rapid compression machine
publisher Society of Polish Mechanical Engineers and Technicians
series Advances in Science and Technology Research Journal
issn 2080-4075
2299-8624
publishDate 2019-03-01
description One of the conditions for controlling the aerodynamic in the reaction chamber is designing a crevice volume on the surface of the piston head. The importance of the crevice volume is to contain the cool boundary layers generated as a resulting of the moving reactor piston. But this crevice volume consequently drops the end gas pressure and temperature at the end of the stroke. The CFD study of the aerodynamic effect of a piston movement in a reaction chamber is modelled using the commercial code of Ansys Fluent and assuming a 2-Dimensional computational moving mesh. A starting optimal crevice volume of 282 mm3 is used for further optimisation. This resulted in five crevice lengths of 3mm, 5mm, 7mm, 9mm and 12mm respectively. The crevice height of 5 mm was found to improve the compressed gas pressure at the end of the stroke to about 2 bar and temperature about 17.7 K and also maintained a uniform temperature field. While that of 12 mm had the least peak compressed gas pressure. This study investigates the possible means of improving the peak pressure and temperature drop in a rapid compression machine by further optimisation of the crevice volume.
topic CFD
optimisation
rapid compression machine
crevice piston
piston stroke
url http://www.journalssystem.com/astrj/CFD-study-of-the-Effect-of-Piston-Crevice-Volume-on-the-Temperature-Distribution,103380,0,2.html
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