By Marco Chiodi
Within the engine improvement procedure, simulation and predictive courses have continually won in reliance. 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 provides an cutting edge 3D-CFD-tool, solely devoted and optimized for the simulation of inner combustion engines. due to more desirable or newly built 3D-CFD-models for the outline of engine procedures, this device guarantees an effective and trustworthy calculation additionally by utilizing path 3D-CFD-meshes. according to this method the CPU-time might be decreased as much as an element a hundred compared to conventional 3D-CFD simulations. furthermore an built-in and automated "evaluation software" establishes a accomplished research of the appropriate engine parameters. because of the power of a competent "virtual improvement" of full-engines, this quick reaction 3D-CFD-tool makes a tremendous contribution to the engine improvement procedure.
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Extra info for An innovative 3D-CFD-Approach towards Virtual Development of Internal Combustion Engines
4 How to Face the Complexity of Future InternalCombustion-Engines The engine of the future is lightweight, small, turbocharged, probably with an unconventional combustion strategy, silent, with extremely low exhaust emissions (also at cold start), very low fuel consumption and CO2 emission, high specific power, “vigorous” torque at low engine speed, long-life reliability and, maybe the most difficult target, it must be still affordable. Now the question is how to organize the future engine development strategy in order to face the increasing complexity and still keep the development and production costs in an affordable business plan.
This considers the changing of the thermodynamic state of the working fluid within the combustion chamber using implemented equations based on the energy conservation. Because it is not the aim to solve the fluid motion this kind of simulations are often called “zero-dimensional”. e. because of this lack in predictability, this approach is actually rather an analysis or calculation tool than a simulation tool. The computational time is very short and the results reliability is after more than 40 years of development very high, even for innovative exchange process and combustion strategies.
MI mE mBB 0 M. 1) 26 3 Engine Energy-Balance Q B W Ind QW H I H E H BB 0. 2. 1: The combustion chamber as an open thermodynamic system. 2: The energy balance of the combustion chamber (Sankey diagram). Based on the conservations equations the energy balance is principally a calculation procedure that permits to relate the energy terms of the system. Usually few of these terms (like Q B , mi and WInd ) are mainly provided by measurements at the test bench so that the energy balance becomes the first approach that links an experimental investigation into a numerical analysis.