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Publication
Análise sobre a utilização do software AVL – combustão (AVL FIRE)
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 4.42 MB | Adobe PDF |
Authors
Abstract(s)
O motor de combustão interna é um sistema mecânico complexo que desempenha um papel essencial em várias indústrias e no nosso dia a dia, tendo, por isso, grande relevância para a sociedade. Atualmente, as pesquisas neste campo estão focadas em encontrar soluções inovadoras para a construção, processos termodinâmicos e tecnologias aplicadas, com o objetivo de aumentar a eficiência de trabalho e reduzir as emissões de gases de escape.
Com o auxílio de softwares avançados, o tempo necessário para analisar novas variações e conceitos de funcionamento de motores foi significativamente reduzido. Por isso, as simulações computacionais assumem um papel crucial no desenvolvimento de motores. A modelação e simulação precisa da geometria do motor e do escoamento de fluidos são, assim, fundamentais para o design e otimização de motores.
Este trabalho centrou-se na análise da utilização do software AVL FIRE™ M, um software de dinâmica de fluidos computacional utilizado principalmente no desenvolvimento de vários tipos de unidades motrizes e seus componentes. A análise da utilização do software foi feita através de um modelo focado na análise de escoamento no cilindro de um motor diesel de injeção direta, tendo sido analisada com detalhe a pressão de combustão. Este modelo foi posteriormente adaptado de acordo com um outro estudo realizado onde foram realizados testes experimentais de desempenho do motor para dois combustíveis diferentes, diesel B7 e B100, sendo o objetivo comparar estes resultados com os resultados obtidos nas simulações com o intuito de validar a utilização do software.
Verificou-se que os resultados obtidos para os regimes às 1600 rpm com 25 e 57% de carga apresentam grande concordância com os resultados experimentais. Para os regimes às 2400 rpm com 45 e 100% de carga, os resultados obtidos já desviavam um pouco dos resultados experimentais, tendo obtido num dos casos cerca de 10% de diferença de pressão máxima em relação aos valores experimentais. No entanto, pode-se concluir que os resultados foram bons o suficiente para a finalidade pretendida, validando assim os resultados obtidos pelo software.
The internal combustion engine is a complex mechanical system that plays an essential role in various industries and in our daily lives, thus holding great significance for society. Currently, research in this field is focused on finding innovative solutions for construction, thermodynamic processes, and applied technology, with the aim of increasing work efficiency and reducing exhaust gas emissions. With the help of advanced software, the time required to analyze new variations and concepts of engine operation has been significantly reduced. Therefore, computational simulations play a crucial role in engine development, and when combined with the enhancement of computational capacity, they become practically indispensable in the production and analysis process. The modeling and simulation of the engine geometry and fluid flow are, therefore, essential for optimization and engine design. This work focused on the analysis of the use of the software AVL FIRE™ M, a computational fluid Dynamics software primarily used in the development of various types of power unit groups and their components. The analysis of the software usage was conducted through a model focused on the flow analysis in the cylinder of a direct diesel injection engine, with a detailed examination of the combustion pressure. This model was subsequently adapted based on another study where experimental performance tests of the engine were conducted for two different fuels, diesel B7 and B100, with the aim of comparing these results with the outcomes obtained from the simulations to validate the use of the software. It was found that the results obtained for the 1600 rpm with 25 and 57% load regimes show a strong agreement with the experimental results. For the regimes at 2400 rpm with 45 and 100% load, the results obtained were deviated somewhat from the experimental results, having achieved in one case nearly 10% difference in maximum pressure compared to the experimental values. However, it can be concluded that the results were good enough for the intended purpose, thus validating the results obtained by the software.
The internal combustion engine is a complex mechanical system that plays an essential role in various industries and in our daily lives, thus holding great significance for society. Currently, research in this field is focused on finding innovative solutions for construction, thermodynamic processes, and applied technology, with the aim of increasing work efficiency and reducing exhaust gas emissions. With the help of advanced software, the time required to analyze new variations and concepts of engine operation has been significantly reduced. Therefore, computational simulations play a crucial role in engine development, and when combined with the enhancement of computational capacity, they become practically indispensable in the production and analysis process. The modeling and simulation of the engine geometry and fluid flow are, therefore, essential for optimization and engine design. This work focused on the analysis of the use of the software AVL FIRE™ M, a computational fluid Dynamics software primarily used in the development of various types of power unit groups and their components. The analysis of the software usage was conducted through a model focused on the flow analysis in the cylinder of a direct diesel injection engine, with a detailed examination of the combustion pressure. This model was subsequently adapted based on another study where experimental performance tests of the engine were conducted for two different fuels, diesel B7 and B100, with the aim of comparing these results with the outcomes obtained from the simulations to validate the use of the software. It was found that the results obtained for the 1600 rpm with 25 and 57% load regimes show a strong agreement with the experimental results. For the regimes at 2400 rpm with 45 and 100% load, the results obtained were deviated somewhat from the experimental results, having achieved in one case nearly 10% difference in maximum pressure compared to the experimental values. However, it can be concluded that the results were good enough for the intended purpose, thus validating the results obtained by the software.
Description
Keywords
Motores de combustão interna AVL FIRE CFD Diesel B7 Biodiesel Pressão de combustão