This research simulates the in-cylinder flow of a swirl chamber type diesel engine using a computational fluid dynamics (CFD) code and reveals the generation and distortion of swirling, tumbling vortices and their influence on turbulence kinetic energy depending on the shape, angle, and area of the jet passage. The CFD code was applied to the intake and compression processes. Results show that flow characteristics were affected by inflow velocity, which depends on the change in the jet passage shape. The swirl ratio was increased as a result of a decrease in the jet passage area. Turbulence kinetic energy was generated by mixing effects of the swirling and tumbling vortices.
DesantesJ. M.PastorJ. V.DoudouA.Study of the steady flow produced by direct injection diesel engine intake ports. Proc. IMechE, Part D: J. Automobile Engineering, 2001, 215 (D2), 285–298.
2.
BenajesJ.MolinaS.GarciaJ. M.RiescoJ. M.The effect of swirl on combustion and exhaust emissions in heavy-duty diesel engines. Proc. IMechE, Part D: J. Automobile Engineering, 2004, 218 (D10), 1141–1148.
3.
HeywoodJ. B.Internal combustion engine fundamentals, 1988, pp. 342–353 (McGraw-Hill, New York).
4.
CunninghamK.KeeR. K.KennyR. G.Reed valve modelling in a computational fluid dynamics simulation of the two-stroke engine. Proc. IMechE, Part A: J. Power and Energy, 1991, 213 (A1), 37–45.
5.
6.
7.
SchmidtD. P.CorradiniM. L.The internal flow of diesel fuel injector nozzles: A review. Int. J. Engine Res., 2001, 2 (1), 1–22.
8.
9.
10.
YeomJ. K.FujimotoH.A study on the behavior characteristics of diesel spray by using a high pressure injection system with common rail apparatus. KSME Int. J., 2003, 17 (9), 1371–1379.
