The effect of bowl-in-piston geometry layout on fluid flow pattern
2011
Аутори
Jovanović, Zoran S.Živanović, Zlatomir M.
Šakota, Željko B.
Tomić, Miroljub V.
Petrović, Velimir
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
In this paper some results concerning the evolution of 3-D fluid flow pattern through all four strokes in combustion chambers with entirely different bowl-in-piston geometry layouts ranging from 'omega' to 'simple cylinder' were presented. All combustion chambers i. e. those with 'omega' bowls, with different profiles, and those with 'cylinder' bowls, with different squish area ranging from 44% to 62%, were with flat head, vertical valves, and identical elevation of intake and exhaust ports. A bunch of results emerged by dint of multidimensional modeling of non-reactive fluid flow in arbitrary geometry with moving objects and boundaries. The fluid flow pattern during induction and compression in all cases was extremely complicated and entirely 3-D. It should be noted that significant differences due to geometry of the bowl were encountered only in the vicinity of top dead centre. Namely, in the case of 'omega' bowl all three types of organized macro flows were observed while in the cas...e of 'cylinder' bowl no circumferential velocity was registered at all. On the contrary, in the case of 'cylinder' bowl some interesting results concerning reverse tumble and its center of rotation shifting from exhaust valve zone to intake valve zone during induction stroke and vice-verse from intake valve zone to exhaust valve zone during compression were observed while in the case of 'omega' bowl no such a displacement was legible. During expansion the fluid flow pattern is fully controlled by piston motion and during exhaust it is mainly 1-D, except in the close proximity of exhaust valve. For that reason it is not affected by the geometry of the bowl.
Кључне речи:
turbulence / fluid flow / computational fluid dynamics / 3-D modellingИзвор:
Thermal Science, 2011, 15, 3, 817-832Издавач:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
DOI: 10.2298/TSCI110417040J
ISSN: 0354-9836
WoS: 000296676400020
Scopus: 2-s2.0-84858769561
Институција/група
Inovacioni centarTY - JOUR AU - Jovanović, Zoran S. AU - Živanović, Zlatomir M. AU - Šakota, Željko B. AU - Tomić, Miroljub V. AU - Petrović, Velimir PY - 2011 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1189 AB - In this paper some results concerning the evolution of 3-D fluid flow pattern through all four strokes in combustion chambers with entirely different bowl-in-piston geometry layouts ranging from 'omega' to 'simple cylinder' were presented. All combustion chambers i. e. those with 'omega' bowls, with different profiles, and those with 'cylinder' bowls, with different squish area ranging from 44% to 62%, were with flat head, vertical valves, and identical elevation of intake and exhaust ports. A bunch of results emerged by dint of multidimensional modeling of non-reactive fluid flow in arbitrary geometry with moving objects and boundaries. The fluid flow pattern during induction and compression in all cases was extremely complicated and entirely 3-D. It should be noted that significant differences due to geometry of the bowl were encountered only in the vicinity of top dead centre. Namely, in the case of 'omega' bowl all three types of organized macro flows were observed while in the case of 'cylinder' bowl no circumferential velocity was registered at all. On the contrary, in the case of 'cylinder' bowl some interesting results concerning reverse tumble and its center of rotation shifting from exhaust valve zone to intake valve zone during induction stroke and vice-verse from intake valve zone to exhaust valve zone during compression were observed while in the case of 'omega' bowl no such a displacement was legible. During expansion the fluid flow pattern is fully controlled by piston motion and during exhaust it is mainly 1-D, except in the close proximity of exhaust valve. For that reason it is not affected by the geometry of the bowl. PB - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd T2 - Thermal Science T1 - The effect of bowl-in-piston geometry layout on fluid flow pattern EP - 832 IS - 3 SP - 817 VL - 15 DO - 10.2298/TSCI110417040J ER -
@article{ author = "Jovanović, Zoran S. and Živanović, Zlatomir M. and Šakota, Željko B. and Tomić, Miroljub V. and Petrović, Velimir", year = "2011", abstract = "In this paper some results concerning the evolution of 3-D fluid flow pattern through all four strokes in combustion chambers with entirely different bowl-in-piston geometry layouts ranging from 'omega' to 'simple cylinder' were presented. All combustion chambers i. e. those with 'omega' bowls, with different profiles, and those with 'cylinder' bowls, with different squish area ranging from 44% to 62%, were with flat head, vertical valves, and identical elevation of intake and exhaust ports. A bunch of results emerged by dint of multidimensional modeling of non-reactive fluid flow in arbitrary geometry with moving objects and boundaries. The fluid flow pattern during induction and compression in all cases was extremely complicated and entirely 3-D. It should be noted that significant differences due to geometry of the bowl were encountered only in the vicinity of top dead centre. Namely, in the case of 'omega' bowl all three types of organized macro flows were observed while in the case of 'cylinder' bowl no circumferential velocity was registered at all. On the contrary, in the case of 'cylinder' bowl some interesting results concerning reverse tumble and its center of rotation shifting from exhaust valve zone to intake valve zone during induction stroke and vice-verse from intake valve zone to exhaust valve zone during compression were observed while in the case of 'omega' bowl no such a displacement was legible. During expansion the fluid flow pattern is fully controlled by piston motion and during exhaust it is mainly 1-D, except in the close proximity of exhaust valve. For that reason it is not affected by the geometry of the bowl.", publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd", journal = "Thermal Science", title = "The effect of bowl-in-piston geometry layout on fluid flow pattern", pages = "832-817", number = "3", volume = "15", doi = "10.2298/TSCI110417040J" }
Jovanović, Z. S., Živanović, Z. M., Šakota, Ž. B., Tomić, M. V.,& Petrović, V.. (2011). The effect of bowl-in-piston geometry layout on fluid flow pattern. in Thermal Science Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 15(3), 817-832. https://doi.org/10.2298/TSCI110417040J
Jovanović ZS, Živanović ZM, Šakota ŽB, Tomić MV, Petrović V. The effect of bowl-in-piston geometry layout on fluid flow pattern. in Thermal Science. 2011;15(3):817-832. doi:10.2298/TSCI110417040J .
Jovanović, Zoran S., Živanović, Zlatomir M., Šakota, Željko B., Tomić, Miroljub V., Petrović, Velimir, "The effect of bowl-in-piston geometry layout on fluid flow pattern" in Thermal Science, 15, no. 3 (2011):817-832, https://doi.org/10.2298/TSCI110417040J . .