Designing new, high-efficiency, low-emissions IC engines presents technical challenges that are often dominated by the chemical kinetics that occur during combustion. Consequently, simulations of combustion for enhanced engine designs need good fuel-combustion chemistry. Modeling and simulation practices that were good enough for the design of yesterday's engines are insufficient for today's engines. Using old practices, the automotive industry often finds that combustion CFD is unable to predict values or even accurate trends in critical combustion behaviors such as ignition, flame propagation, and emissions. This makes it tough to use simulation effectively to address the increased complexities in efficiency and emissions prediction.
Today's engine and combustor designers are striving to attain low emissions and high efficiency more rapidly and at a lower cost than ever before. Combustion modeling can generate substantial savings in engine development cost and improved product quality, but challenges in achieving these benefits often arise due to inaccuracies in the fuel model. Engine designers have traditionally used severely reduced fuel models in combustion simulations. These models can require complicated tuning or adjustment in order to provide predictive results. Alternatively, advanced combustion simulation tools like Ansys Forte and Ansys Chemkin-Pro can take advantage of larger and more accurate fuel models and still provide fast time-to-solution. The Model Fuel Library provides a set of accurate real-fuel models that are easy to use in modern tools.
Unlike legacy computational fluid dynamics (CFD) tools that solve IC engine problems, Forte rapidly predicts engine ignition and emissions. By incorporating proven Ansys Chemkin-Pro solver technology — the gold standard for modeling and simulating gas-phase and surface chemistry — Forte combines multicomponent fuel models with comprehensive spray dynamics. It delivers greater accuracy without compromising time-to-solution.
A common difficulty in simulating complex fluid flow problems is that some geometries can not be well-represented using a single, continuous mesh. In many cases, different geometrical features are best represented by different mesh types. Preparing this mesh can be time-consuming and complicated. Additionally, the large, poorly structured meshes that result can take excessive time to solve and can result in reduced accuracy.
A common difficulty in simulating complex fluid flows is that some geometries cannot be well-represented using a single, contiguous mesh. In many cases, distinct geometrical features are best represented by different mesh types. Preparing the finished mesh can thus be time-consuming and complicated. And, the large, poorly structured meshes that emerge can take excessive time to solve and result in reduced accuracy.
Fluent software contains the broad, physical modeling capabilities needed to model flow, turbulence, heat transfer and reactions for industrial applications. These range from air flow over an aircraft wing to combustion in a furnace, from bubble columns to oil platforms, from blood flow to semiconductor manufacturing and from clean room design to wastewater treatment plants. Fluent spans an expansive range, including special models, with capabilities to model in-cylinder combustion, aero-acoustics, turbomachinery and multiphase systems.
Ansys EnSight makes it easy to gain deeper engineering insight and clearly communicate your results. You can handle the largest datasets, produce top quality images and animations, share 3D models, compare simulation results between design variations and solvers, and post-process interactively by day and by batch at night. Ansys EnSight Enterprise processes very large models of over 100 million cells.