Abstract
Fluid flows an internal combustion engine plays one of the most challenging fluid dynamics problems to model. It is only due to the variation of density along the flow field. So a clear understanding of the flow and combustion process is needed to enhance the engine performance and to minimize emission compromising fuel economy. An attempt is made in this paper to simulate the model of a direct injection diesel engine with the hemispherical bowl in the piston using a finite volume method. This model is used for understanding the in-cylinder gas motion with details of the combustion process to evaluate the engine performance. Combustion flow simulations were carried out at a different crank angle to analyze the distribution of temperature in the combustion chamber. In addition, swirl ratio, cylinder pressure, and kinetic energy at a different crank angle were investigated from the combustion flow simulation. However, injection rate sha** also plays a vital role in combustion and then further affect the subsequent combustion and emission performance. In this study, four different injection rate shapes (base, rectangular, sine, trapezoidal, and triangular) with constant injection duration and injected fuel mass is simulated to study the engine performance and emission rate. The emission rate includes NOx, CO, unburnt hydrocarbon, and soot. Finally, simulation results were compared with results obtained from the experiment. The effect of different rate shapes on emission and engine performance was discussed and concluded.
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Panda, S., Banerjee, R. (2019). An Investigation of the Impact of Injection Profile Sha** on the Performance-Emission Characteristics of an Existing CI Engine: A CFD Approach. In: Kumar, M., Pandey, R., Kumar, V. (eds) Advances in Interdisciplinary Engineering . Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-6577-5_37
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DOI: https://doi.org/10.1007/978-981-13-6577-5_37
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