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Abstract

The measurement and evaluation of the tumble motion in an engine cylinder are widely achieved by steady-flow tests. However, there is absence of a standard methodology for the evaluation of the tumble motion in the steady-flow tests. The aim of this paper is to analyse the variation in the evolution of the tumble motion with different tumble test methods. Both steady-flow tests and particle image velocimetry measurements were carried out on a commercial four-valve spark ignition engine. The results showed that, for the indirect test method, the variation in the diameter of the cross pipe has a negligible effect on the non-dimensional tumble intensity, although the angular momentum flux is proportional to the diameter of the cross pipe owing to the conservation of the rotational kinetic energy flux. For the direct test method, there is an obviously abrupt rise in the tumble intensity with increasing valve lift because the in-cylinder flow evolves into a single large-scale tumble vortex in a short transition phase. Moreover, the rotational speed of the tumble flow increases when a dummy cylinder with a smaller outlet diameter is used in the direct test method.

Keywords

Steady-flow tests tumble motion direct test method rotational kinetic energy

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References

Heywood

JB.

Internal combustion engine fundamentals. New York: McGraw-Hill, 1988.

Liu

Prediction of tumble speed in the cylinder of the 4-valve spark ignition engines. SAE paper 2000-01-0247, 2000.

Stone

Ladommatos

The measurement and analysis of swirl in steady flow. SAE paper 921642, 1992.

Endres

Neuβer

Wurms

Influence of swirl and tumble on economy and emissions of multi valve SI engines. SAE paper 920516, 1992.

Ramajo

Zanotti

Nigro

In-cylinder flow control in a four-valve spark ignition engine: numerical and experimental steady rig tests. Proc IMechE Part D: J Automobile Engineering2011; 225(6): 813–828.

Baker

Benjamin

Girgis

Newman

Characterisation of barrel swirl motion under steady flow conditions. SAE paper 950729, 1995.

Zhao

Leach

. Optimisation of in-cylinder flow for fuel stratification in a three-valve twin-spark-plug SI engine. SAE paper 2003-01-0635, 2003.

Liu

Wang

Jia

Wang

GD.

Cycle-to-cycle variation analysis of in-cylinder flow in a gasoline engine with variable valve lift. Exp Fluids2012; 53(3): 585–602.

Bottom

KE.

PIV measurements of in-cylinder flow and correlation with engine performance. PhD Thesis, Mechanical Engineering, University of Wisconsin–Madison, Madison, Wisconsin, USA, 2003.

10.

Begg

Hindle

Cowell

Heikal

MR.

Low intake valve lift in a port fuel-injected engine. Energy2009; 34(12): 2042–2050.

11.

Müller

SHR

Böhm

Gleißner

. Flow field measurements in an optically accessible, direct-injection spray-guided internal combustion engine using high-speed PIV. Exp Fluids2010; 48(2): 281–290.

12.

Wang

Peng

Wang

. In-cylinder air motion characteristics with variable valve lift in a spark ignition engine. Part 1: swirl flow. Proc IMechE Part D: J Automobile Engineering2011; 225(4): 479–497.

13.

Ramajo

Nigro

. In-cylinder flow computational fluid dynamics analysis of a four-valve spark ignition engine: comparison between steady and dynamic tests. Trans ASME, J Engng Gas Turbines Power2010; 132(5): 1–10.

14.

Liu

Analysis of the in-cylinder flow and performance in SI engine with variable valve actuation. Master Thesis, School of Mechanical Engineering, Tianjin University, Tianjin, People’s Republic of China, 2008.

15.

Wang

. Parametric design of the tangential intake port in diesel engines. Proc IMechE Part D: J Automobile Engineering2013; 227(3): 409–421.

16.

. Some critical technical issues on the steady flow testing of cylinder heads. SAE paper 2001-01-1308, 2001.

17.

Heim

Ghandhi

. Investigation of swirl meter performance. Proc IMechE Part D: J Automobile Engineering2011; 225(8): 1067–1077.

18.

Adomeit

Jakob

Pischinger

Brunn

. Effect of intake port design on the flow field stability of a gasoline DI engine. SAE paper 2011-01-1284, 2011.

19.

Grimaldi

Battistoni

Uccellani

. Dependence of flow characteristics of a high performance SI engine intake system on test pressure and tumble generation conditions – Part 1: Experimental analysis. SAE paper 2004-01-1530, 2004.

20.

Keane

Adrian

. Optimization of particle image velocimeters. I. Double pulsed systems. Measmt Sci Technol1990; 1(11): 1202–1215.

21.

Zhao

Peng

Ladommatos

. Tumbling flow analysis in a four-valve spark ignition engine using particle image velocimetry. Int J Engine Res2002; 3(3): 139–155.

22.

Grimaldi

Battistoni

Postrioti

. Flow characterization of a high performance S.I. engine intake system – Part 1: experimental analysis. SAE paper 2003-01-0623, 2003.

23.

Omori

Iwachido

Motomochi

Hirako

. Effect of intake port flow pattern on the in-cylinder tumbling air flow in multi-valve SI engines. SAE paper 910477, 1991.

Insights into the development of the tumble motion using the direct and indirect steady-flow test methods

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