Simulation of the Effect of Angle of Injection Toward the Diffusion of Fuel Atomization

• Main Author: Felix
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/37930
• Institution: Institut Teknologi Bandung

Motor vehicle gas emissions adversely affect the quality of the environment and human health. Exhaust gas emissions regulation have became stricter from year to year. The mixture’s quality of fuel and air affects the exhaust emissions. In port fuel injection systems, the phenomena or the interaction between the injected fuel and the air is one of the main processes which has to be investigated because it governs the quality of the exhaust air and the engine performances. The learning about the characteristics of the interaction will be beneficial and will aid in deciding the good injection angle and in designing the optimum intake port. Computational Fluid Dynamic Methods which are provided by Fluent software will be used in simulating the interaction behaviour between the fuel and the air. The intake port geometry of yamaha vixion shall be functioned as the model for simulation. The fuel will be injected in several injection angles and will interact with the air flows which are illustrating the variety of engine rotations. The simulation results show that the injection angle of 60° produces the injection profiles which are active in wetting the intake port and the fluid diffuses and is concentrated in certain places in the intake port. The diffusion of the fuel at the injection angle of 30° yields the deposit in broad surface area around the intake port and at 4000 rpm and 6000 rpm, the penetration of the liquid fuel impacts the wall. The injection angle of 45° is the best angle as it generates minimum fuel dispersion in wetting the intake port. This is consistent with the real injection design of yamaha vixion.