Development of an efficient 3-D CFD software to simulate and visualize the scavenging of a two-stroke engine

The two-stroke engine is widely used in many different devices. But the environmentally problematic exhaust characteristic is a big drawback of this type of engine. In the scavenging process, when the fresh charge displaces the exhaust gas in the cylinder, lies the biggest opportunity to improve the exhaust data by geometry optimization. <br>Therefore, we developed a software package to efficiently simulate the three-dimensional, time-dependent, Navier-Stokes equations within the complex, real-world geometry of the two-stroke engine with moving piston and rotating crankshaft. Due to the high temperature in the cylinder after combustion, a temperature dependent treatment of the material constants is necessary. <br>Adaptive local time-stepping and dynamic local mesh adaption, as well as parallelization of the code, are used to speed up the computation time considerably. <br>The software has been extensively validated and has been applied to the problem of short-circuiting in two-stroke engines.

Author dc:creator

• Trescher, Dirk

Contributors dc:contributor

• Kröner, Dietmar

• Adaptive Gitterverfeinerung
• Lokale Zeitschrittweitenadaption
• Temperaturabhängige Materialkonstanten
• Relaxationsmethode
• bewegte Gitter
• Computational Fluid Dynamics
• Two-Stroke Engine
• Navier-Stoke Equations
• Finite Volume Scheme
• Moving Meshes

Repository record source_url

https://freidok.uni-freiburg.de/data/2096

OAI identifier oai:identifier

oai:freidok.uni-freiburg.de:2096