Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
HEAD PISTON GEOMETRY OPTIMIZATION: A CRFD STUDY APPLIED TO A LOCOMOTIVE ENGINE
Submission Author:
Milton Keisy Kouketsu , SC
Co-Authors:
Milton Keisy Kouketsu, Javier Antonio Mendoza Corredor , Gabriel de Andrade Janene Gonini, Miguel Barrientos, Leonel R Cancino
Presenter: Milton Keisy Kouketsu
doi://10.26678/ABCM.ENCIT2022.CIT22-0079
Abstract
Daily people make use of different types of transport, whether by land, sea or air. In turn, the powertrain systems of these means of transport are mostly provided with internal combustion engines that use fuels such as gasoline, diesel and ethanol. It is true that in recent years these engines have been modernized and have become more efficient and less polluting, however, vehicles with electric or even hybrid propulsion systems are increasingly present in our environment, or even those that use less polluting and more efficient alternative fuels such as hydrogen or bio-fuels. In this sense, studies of sustainability, energy efficiency and optimization of existing internal combustion engines are extremely necessary to obtain efficiency gains by reducing the fuel consumption and pollutants in order to allow the continuity of use of these engines until they can be replaced. The rail transport sector is used worldwide for the transport of passengers as well as for the transport of cargo, and these have powerful internal combustion engines and consequently are large consumers of fuels such as diesel. Studies to optimize these engines are necessary so that they become more efficient and less polluting. By optimizing the injection system parameters such as the fuel spray angle, or piston head geometry, for example, it is possible to obtain an efficiency gain. This work focuses on the piston head geometry optimization of a diesel-powered railway internal combustion engine through numerical analysis. For this, the AVL-FIRE™ software was used. The piston head geometry optimization was performed using the following variables: in-bowl radius, top dead center clearance gap and top bowl center depth. The results are then analyzed in terms of power, torque, fuel consumption and emissions. Through numerical simulation of computational reactive fluid dynamics (CRFD), the results obtained shows that an optimization of the piston head geometry represents an efficiency gain for the internal combustion engine in question.
Keywords
Rail Diesel Engine, Computational Reactive Fluid Dynamics (CRFD), Optimization, AVL-Fire, Piston Head Geometry
