Realis Simulation 2022.3

The 2022.3 release from Realis Simulation is now available to download. The transportation design industry is in a complex position - with the simultaneous requirements to develop new propulsion technologies that replace fossil fuels and to make existing IC engines as environmentally friendly as possible in the short term, especially for specific applications. This new exciting release aims to enhance the tools that assist designers in both areas, enabling the journey towards net zero across the full range of propulsion system applications.

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Fluid Dynamics

Faster, more optimised design of lower emissions IC engines

Quick, accurate modelling of heavy duty diesel emissions offers optimisation opportunities to reduce NOx emissions. In this release, it can be done faster than real time in WAVE–RT using our new real-time emissions analysis tool and also includes the ability to model Unburned Hydrocarbons which are key components in IC engine emissions. Refinement and optimisation of heavy duty diesel engines is further improved with an enhanced Diesel Predictive Model which accurately models to within a few percentage points of physical test data.

Modelling new fuel technology

Hydrogen has been identified as a promising de-carbonisation fuel alternative especially in heavy duty, power generation and marine applications. In this release, VECTIS, our 3D CFD tool, has a new lean hydrogen flame speed modelling capability allowing accurate and robust hydrogen combustion models to simulate emissions when running with hydrogen. However, using new fuels presents new challenges such as modelling ‘knock’ when using Natural Gas or Hydrogen fuelled engines with larger compression ratios. VECTIS 2022.3 includes an innovative decoupled knock modelling capability which is enabled from the Ignition Probability model configuration.

In addition, we are constantly making our tools easier to use with improved 3D and network acoustic post-processing, refined productivity models, simpler geometry imprinting, better parametric solutions and updated iso-volumes support for post-processing.

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Structural Mechanics

Faster, more optimised design of lower emissions IC engines

Optimising the design of IC engines is essential in reducing emissions in the short to medium term. In this release, enhancements to RINGPAK allow for modelling of oil flow through oil control ring slots, to help minimise Lubricant Oil Consumption (LOC) and cut emissions across different ring geometries. In parallel, efficient engines result in lower heat losses and emissions and with this in mind, ENGDYN has the added capability of simulating misaligned bearings, minimising friction losses and improving durability. Finally at a time when resources are tighter than ever before, design must be done quickly and efficiently. FEARCE-Vulcan now supports distributed solutions allowing thermal analysis to be run in parallel across multiple engine loads to reduce simulation timescales and SABR-Gear enables thousands of designs for durability, NVH, size and efficiency to be considered in a matter of minutes using parameter studies applied to macro gear geometry.

Modelling new fuel technology

Natural Gas has been identified as a promising de-carbonisation fuel alternative in IC engine applications across heavy duty (on and off highway), power generation and marine. In this release, the combustion model in FEARCE-Vulcan has been extended to support natural gas combustion, for both direct and port fuel injection types, including Liquefied Petroleum Gas (LPG), Compressed Natural Gas (CNG) and Liquefied Natural Gas (LNG). This enables the engineer to investigate the thermal performance of IC engines using these fuels.

In addition, we are constantly making our tools easier to use, with usability improvements to increase speed and accuracy including separating friction co-efficients in piston rings, multi-edit of loadcases in SABR and hard contact visualisation. VALDYN now allows 3D visualisation of perturbation analysis, while FEARCE employs an improved fatigue algorithm for more accurate high cycle durability results. Finally, the SABR-Gear ratio design wizard allows teeth numbers to be quickly generated for desired ratios.

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Complex Systems

IGNITE is a system modelling platform that supports simulation of existing and future propulsion technologies in conjunction with other Realis and 3rd party tools, such as WAVE-RT and Matlab Simulink. To enable this, we are continuously working on improving workflows using FMU's and High Performance Computing (HPC) clusters, delivering engineering solutions in ever-shorter timescales.

Faster, more optimized design of lower emissions IC engines

In today's market, manufacturers are under increasing pressure to reduce tailpipe emissions produced by ICE powertrains. Building on the exhaust after-treatment library delivered in 2022.1 and focusing on possible Euro7 emissions solutions, it is now possible to model particulate filters included in exhaust systems.

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