Abstract
The scavenging efficiency of a two-stroke-cycle internal combustion engine is considered applying the numerical analysis technique developed by the authors. In this method liner ports are opened and closed by the reciprocating piston and so the unsteady scavenging flow in a cylinder can be simulated reasonably. Also, the scavenging efficiency can be estimated by analyzing residual gas concentration in a cylinder. The relation between liner port swirl angles and scavenging flow characteristics, especially the scavenging efficiency in a uniflow scavenging engine is obtained. An idea of liner port arrangement to improve the scavenging efficiency is proposed.
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