A multidimensional calculation method is developed to study the gas exchange flow in loop-scavenged two-stroke engine. The grids in the expanding/contracting region move in accordance with the piston motion. In the cylinder head region curvilinear-orthogonal grids are employed. The EPISO algorithm is adopted as the solution procedure. Details of the gas exchange process and the flow structure in the cylinder are shown. Good agreement in the scavenge efficiency along with the trapping ratio with measurements is obtained. To examine the effects of cylinder head geometry, the head curvature is gradually increased in the cases tested. Results indicate that the shaping of the head leads to a better constructed tumbling vortex by the end of scavenging period and slight enhancement of scavenge efficiency.
|Number of pages||9|
|Journal||Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao|
|State||Published - 1 Oct 1996|