Abstract
The paper presents numerical analysis of charge exchange in an opposed-piston two-stroke engine. The research engine is a newly designed internal diesel engine. This unit is composed of three cylinders in which operate three pairs of opposed-pistons. The numerical investigations were carried out using ANSYS FLUENT solver. The geometrical model includes an intake manifold, a cylinder and an outlet manifold. The calculations specified a swirl coefficient obtained under steady conditions for fully open intake and exhaust ports as well as the CA value of 280° for all cylinders. In addition, mass flow rates were identified separately in all of the intake and exhaust ports to achieve the best possible uniformity of flow in particular cylinders.
Highlights
This article covers work on concept of the designed engine intake system
Numerous studies aimed to optimise the operation of internal combustion engines are conducted, e.g. the scavenging process in a two-stroke free piston linear engine has been modelled and simulated successfully based on the combination of a dynamic model and a CFD model, see [9]
The numerical investigations were carried out using ANSYS FLUENT solver
Summary
This article covers work on concept of the designed engine intake system. Its more detailed description is contained in articles [1] and [2]. Earlier solutions of the proposed construction included an inlet and outlet system with double-sided operation, i.e. both inlet and outlet channels were developed on both sides of the engine. It seems that this solution facilitates obtaining even medium supply and flow with the lowest losses. Numerous studies aimed to optimise the operation of internal combustion engines are conducted, e.g. the scavenging process in a two-stroke free piston linear engine has been modelled and simulated successfully based on the combination of a dynamic model and a CFD model, see [9]. The authors of [10] reviewed in detail conventional internal combustion engines and indicated twostroke ones as investigated most frequently for their advantageous construction and control
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