| Summary: | 碩士 === 國立臺北科技大學 === 車輛工程系 === 106 === This study describes the simulation and validation of a gasoline direct injection turbocharged engine. Experiments were performed from 1000rpm to 5000 rpm with the wide open throttle, and combustion parameters were derived from the experimental measurements of the in-cylinder pressure traces. Engine simulations were performed by Ricardo WAVE.
Efficiency and mass flow rate coefficient of the turbocharger, heat transfer coefficient of the intake and exhaust ports, in-cylinder convective heat transfer coefficient and the open area of the wastegate that are calibrated to fit the experimental data after setting up the parameters of the simulation environment, the intake and exhaust systems, the engine body and the turbocharger.
Finally, simulation results of volumetric efficiency, mean effective pressure, brake specific fuel consumption, and cylinder pressures are validated with the experiment, which means the engine developed by WAVE is able to simulate the combustion characteristics, performance and fuel consumption of the target engine. Therefore, the operating point of the turbocharger, 50% mass fraction burned, combustion duration and open area of the wastegate are critical parameters affecting the performance and fuel consumption of the engine simulation are concluded.
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