A Mathematical Model for the Exhaust Gas Temperature Profile of a Diesel Engine

This work presents a heat transfer model for the exhaust gas of a diesel power generator to determine the gas temperature profile in the exhaust pipe. The numerical methodology to solve the mathematical model was developed using a finite difference method approach for energy equation resolution and determination of temperature profiles considering turbulent fluid flow and variable fluid properties. The simulation was carried out for engine operation under loads from 0 kW to 40 kW. The model was compared with results obtained using the multidimensional Ansys CFX software, which was applied to solve the governor equations of turbulent fluid flow. The results for the temperature profiles in the exhaust pipe show a good proximity between the mathematical model developed and the multidimensional software.

[1]  J. Sodré,et al.  Hydrogen impacts on performance and CO2 emissions from a diesel power generator , 2013 .

[2]  Ugur Kesgin,et al.  Study on the design of inlet and exhaust system of a stationary internal combustion engine , 2005 .

[3]  Weeratunge Malalasekera,et al.  An introduction to computational fluid dynamics - the finite volume method , 2007 .

[4]  Dimitrios T. Hountalas,et al.  The influence of the exhaust system unsteady gas flow and insulation on the performance of a turbocharged diesel engine , 1995 .

[5]  José Ricardo Sodré,et al.  Análise do Perfil de Temperaturas no Gás de Exaustão de um Motor pelo Método das Diferenças Finitas , 2014 .

[6]  L. Burmeister.  Convective heat transfer , 1983 .

[7]  Hamid Mahmoudi,et al.  Modeling of catalytic monolith reactor for reforming of hexadecane with exhaust gas , 2013 .

[8]  Willard W. Pulkrabek,et al.  Engineering Fundamentals of the Internal Combustion Engine , 1997 .

[9]  Daniel B. Olsen,et al.  Compression ignition engine performance and emission evaluation of industrial oilseed biofuel feedstocks camelina, carinata, and pennycress across three fuel pathways , 2014 .

[10]  Matthew J. Hall,et al.  Model of Heat Exchangers for Waste Heat Recovery from Diesel Engine Exhaust for Thermoelectric Power Generation , 2012, Journal of Electronic Materials.

[11]  Pedro Piqueras,et al.  Heat transfer modelling in honeycomb wall-flow diesel particulate filters , 2012 .

[12]  M. N. Özişik,et al.  Finite Difference Methods in Heat Transfer , 2017 .