Diseño aerodinámico y prototipado del vehículo Interprovincial ALFA-700 para Metálicas Pillapa.

Abstract

Having as a reference photographs and the commercial plans of the Alfa-700 bus belonging to Pillapa Metal company from Pelileo, it is aimed to improve that model of inter provincial bus, beginning with the modeling in the "Solid Works 2016" software, a file in the format .STEP was generated to eventually import the model to ANSYS WORKBENCH 17.1 software in which the corresponding dynamic analysis for finite elements will be performed, calculating the coefficients of resistance Cd and the lift coefficients Cl to speed up to 90 km/h, the maximum allowed by the National Agency of Transit (NAT) and 120 Km/h for safety. With the results obtained, it was identified that the coefficient of resistance and lifting of the model of the Alfa-700 bus are improvable and could be reduced through some changes in the bodywork, with this preview the redesign of the bus started aiming that the new prototype shows a lower resistance to airflow, save oil and be more esthetical. In the new prototype, the front and back of the bus were modified since the new model ought to be more aerodynamic and efficient when it is being driven on roads. The designs were printed in a 3D scale with Polylactic filament (PLA), which were used to make a real analysis of the airflow by using a smoke chamber and other analysis of resistance and load in a wind tunnel. The analysis performed for the prototype proposed in this graduation work were very satisfactory when it comes to reducing the level of resistance and so a reduction in the gas consumption, making it more convenient as well as esthetical. It is recommended, for any kind of analysis, to model with real measures in order to get reliable data, more likely to be real.