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[Climate change demands extensive measures on a global scale to limit its impact on the environment to a tolerable level. In , for example, a necessary CO2 emission reduction by 60% compared to 1990 in the European Union was estimated to keep the global warming below 2 °C. Assuming an equal...
[In the context of reducing CO2 emissions, alternative or synthetic fuels can significantly improve the ecological footprint of internal combustion engines. To adapt an engine to changing fuel characteristics, 0D/1D simulations offer an efficient way to streamline the engine development process....
[In order to evaluate the relevance of the Darrieus-Landau instability and the fuel-dependent flame wrinkling for engine combustion, as described in Chapter 2.3.2 and Chapter 2.5, a measurement data analysis was carried out on two engines. Their technical data and available operating conditions...
[In its original specification, the burn rate model described in Chapter 2.2 only allows for a prediction of moderate fuel variations, like adding hydrogen to methane (see ). For a more significant fuel variation like methane, gasoline and ethanol, a recalibration is necessary (see Figures...
[The improved burn rate model was validated using engines A and B. Their data are provided in Table 3.1 and Table 3.2. The PTA settings were given in Chapter 3. Additionally, measurements of engines C, D, E and F were available for model validation. Engine C is a high-turbulence long-stroke...
[As validated in Chapter 5, the influence of a fuel variation on engine combustion characteristics can be predicted by only using fuel-specific models for the laminar flame speed and thickness. These characteristics represent, to a certain extent, the chemical effect of the fuel. To test a...
[In this thesis, a quasi-dimensional spark-ignition burn rate model for predicting the effects of changing fuel, air-fuel ratio λ, exhaust gas recirculation (EGR) and water injection was developed and validated for a wide range of boundary conditions. In the validation process, a high predictive...
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