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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Society of Polish Mechanical Engineers and Technicians
2019-03-01
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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 |
work_keys_str_mv |
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