Don't just simulate, innovate!
Designers of modern Internal Combustion engines face huge challenges to deliver power units which satisfy legislation and have competitive economy, performance and manufacturing cost. In particular, technology advances in fuel injection systems, alternative fuels, combustion systems, multi-fuel operation, downsizing and engine management coupled to ever shorter engine development timescales dictate that analysis is used widely to deliver optimum solutions.
STAR-CD has been actively used for in-cylinder analysis for over 30 years and there are many engines in production around the world today that have benefitted from its use. These range from the smallest motorcycle, through to car and truck engines, to the largest stationary and marine engines. To keep pace with developments in engine technology, STAR-CD/es-ice is continually developing new capabilities and functionality, increasing the star-cd and ease with which powertrain engineers can execute projects.
The latest release delivers further improvements to the es-ice automated meshing processes and es-ice post-processing capabilities. The new meshing technology enables the user to generate accurate meshes automatically for full geometry, complete cycle calculations of 4-stroke gasoline and diesel engines. The mesh structure consists of prism layers at the boundary to capture near-wall gradients, an aligned mesh within the valve gap and a hexahedral mesh within the core of the model. A sequence of meshes is generated at distinct crank-angle positions during the engine cycle as a pre-processing step. These are subsequently morphed over a crank-angle range selected automatically to give optimum mesh quality. A fully automated process is used to minimize mesh generation time and allow the user easy control over mesh size.
The combustion models have been significantly enhanced, with new fuel chemistry libraries available for single and dual engine operation. These include gasoline, diesel, natural gas and ethanol, natural gas–diesel, gasoline-diesel and gasoline-ethanol. The dual-fuel libraries provide a way to accurately simulate dual-fuel engines that require the combined chemistry of both fuels.