Three-Dimensional Computation of the Scavenging Flow Process in a Motored Two-Stroke Engine CFD Research Corporation

Format:

Conference/Event

Author/Creator:

Lai, Y.-G, author.

Conference Name:

International Congress & Exposition (1993-03-01 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1993

Summary:

An advanced multi-domain CFD analysis approach is proposed to calculate the scavenging flow process in motored two-stroke engines. An implicit and conservative treatment at the domain interface is developed which offers significant speedup in convergence. An arbitrary Lagrangian-Eulerian approach for moving grid and a grid remeshing technique for grid sliding at engine cylinder/transfer ports interfaces are used for efficiency and accuracy. A three-dimensional simulation of the Mercury Marine research two-stroke engine is carried out to demonstrate the approach. Six computational domains are used which naturally represent the geometries of the cylinder, engine dome, exhaust and transfer portraits The influence of boost port inclination angle on the scavenging process of the two-stroke engine is also studied numerically. The computation is supplemented with a standard two-equation turbulence model with compressibility correction. The calculated results show that the flow patterns vary rapidly with the piston motion. Complex non-uniform velocity distribution and vortical flows are developed in the engine cylinder and exhaust portrait It is noticed that different arrangement of the boost port could alter the scavenging process significantly. In general, it is found that better scavenging efficiency is obtained with increasing boost angle

Notes:

Vendor supplied data

Publisher Number:

930499

Access Restriction:

Restricted for use by site license