Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
VISUALIZATION OF LUMINOSITY VARIATION IN THE COMBUSTION CHAMBER OF A DIESEL CYCLE ENGINE USING HIGH SPEED VIDEO CAMERA
Submission Author:
Deliene Costa Guimarães Barros , MG
Co-Authors:
Deliene Costa Guimarães Barros, Débora de Oliveira Borges, Bruno Ferreira, Sergio Hanriot, Rogério Jorge Amorim
Presenter: Rogério Jorge Amorim
doi://10.26678/ABCM.COBEM2023.COB2023-2155
Abstract
The investigation of the use of biodiesel and diesel blends in internal combustion engines is crucial, as it can help reduce dependence on fossil fuels and mitigate negative environmental impacts by reducing polluting gas emissions. In this work, we present an experimental evaluation of the use of biodiesel and diesel blends in a Diesel cycle engine. During the experiment, combustion was monitored using a high-speed camera and an endoscope, which was inserted into a viewing window. The cycles were recorded as photographs taken every 2.5° of the crankshaft angle, with numerical values assigned to each pixel according to an RGB scale. Only the luminosity resulting from combustion was present inside the combustion chamber. Therefore, all the observed luminosity was due to the combustion flame. The images were processed using Davis® software, and the weighted average of the pixel values was calculated, representing the luminosity inside the combustion chamber at a given moment of the cycle. Comparisons were made between the images obtained with 100% biodiesel (B100) and a mixture containing 10% biodiesel in diesel (B10) at varying loads. The collected data formed graphics of luminosity in relation to the crank angles, which were parameterized based on the highest image value generated in the tests. The results showed that, for both fuels, the luminosity inside the combustion chamber increased with increasing load and flame time under the same pressure, indicating that the duration of luminosity inside the chamber was also longer.
Keywords
High Speed Video Camera, Combustion, Engine combustion analysis, Internal combustion engine, biodiesel, Diesel
