An innovative 3D-CFD-Approach towards Virtual Development of by Marco Chiodi

By Marco Chiodi

Within the engine improvement approach, simulation and predictive courses have always received in reliance. as a result of complexity of destiny inner combustion engines the functions of simulations courses in the direction of a competent "virtual engine improvement" is a necessity that represents one of many maximum demanding situations. Marco Chiodi offers an leading edge 3D-CFD-tool, solely devoted and optimized for the simulation of inner combustion engines. due to enhanced or newly built 3D-CFD-models for the outline of engine methods, this instrument guarantees an effective and trustworthy calculation additionally through the use of direction 3D-CFD-meshes. in accordance with this strategy the CPU-time may be lowered as much as an element a hundred compared to conventional 3D-CFD simulations. furthermore an built-in and automated "evaluation device" establishes a complete research of the suitable engine parameters. because of the strength of a competent "virtual improvement" of full-engines, this speedy reaction 3D-CFD-tool makes a massive contribution to the engine improvement procedure.

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In Western Europe, this new generation of diesel engines has drastically increased the market share within short time: more than 40% in average and up to 75% in the market segment of SUV and luxury class. Especially in these classes where the weight of the car is higher and engine displacement is at about 3 liters the advantages in term of 4 1 Introduction fuel saving and CO2-emissions are unbeatably by the diesel engine in comparison to an equivalent gasoline one. 2 The Role of Alternative Engine Concepts Since the beginnings of the automotive mobility, the interest in finding competitive alternative concepts to internal combustion engines has always been very high.

What has changed in the last years and will continuously become harder in the future are the limitations on the environmental impact of transportation in general and in particular of private transportation. This welcomed, positive and irreplaceable process towards a real sustainable mobility will dictate the future development steps in the automotive sector. 1 Development Targets of Internal Combustion Engines in the Past At the beginning of the history of internal combustion engines the development priorities were principally the increasing of power and engine speed.

3 Introduction to Engine Processes Modeling in the Simulation of the Operating Cycle 23 sophistication in order to establish a balance of complexity and details amongst the engine process models. The development and validation steps of a 3D-CFD-model are a particular challenge. 7). For this reason, due to the absence of reliable local measurements of the investigated process on a real “unmodified” engine, the validation of the 3D-engine models still represents a critical and often “subjective” step.

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