b'Marine | Engineer InnovationFigure 8: Expensive test rig time can be significantly reduced thanks to the use of simulation through the complete development cycle fromideation, concept and detailed design stagesavailable to us to create the bestoptimized to comply with all existing possible product in a way that was notand anticipated emission regulations possible twenty years ago. We wouldand has an expected lifetime of 40 not have been able to work this wayyears. without the modern CAE tools and high performance computing (HPC)From this discussion, it is clear to see systems. that CFD simulation is embedded in the design process at Wrtsil and has been Powering the ships of the future instrumental in helping them to bring All these different contributions fromthis new engine to market in just five CFD to the design process can be seenyears. The Wrtsil 31 engine was in efficiency of the final engine,officially unveiled at Nor-shipping 2015 contributing to the reduction in CO2and Wrtsil have already fulfilled emissions compared to equivalentorders for both gas and diesel modes. engines. Diesel fuel consumption canAs ship owners look to meet efficiency run as low as 165 g/kWh, while the totalregulations, Wrtsil are meeting that hydrocarbon emissions of the gasmarket demand, aided by their use of engine have been reduced by up toSimcenter and digital design. n50 percent. The engine has been Figure 7: Temperature distribution on the complete engine block stemming from solid/liquid CHT simulations9'