Impact of wall heat transfer on engine behavior

The effect of thermal wall functions is discussed in terms of engine thermal balance, thermal state characterization and impact on engine performance. In particular, the newly implemented GruMo-UniMORE wall function is applied to improve the prediction of knock limit in SI engines and combustion behavior in CI engines.

Dual fuel engine charge motion & combustion study

With increasingly strict emissions legislation, an alternative to conventional fuel is natural gas. It is available in abundance, cheaper than Diesel and gasoline and most importantly, releases less greenhouse gases (CO2) during combustion due to higher H/C ratio. The dual fuel engine with natural gas as primary fuel and Diesel as secondary fuel for pilot injection is a promising concept for future reciprocating engines. However, due to slow flame propagation in leaner (Φ~0.6) fuel/air ratios, combustion remains incomplete releasing CO, formaldehyde, and unburnt CH4.

In-cylinder simulation in STAR-CCM+

An updated road map of in-cylinder migration from STAR-CD® into STAR-CCM+® will be presented. Material will include the current status of migration activities, upcoming critical events, and a demonstration of the latest version of the upcoming add-on for setting up in-cylinder simulations in STAR-CCM+.