Experiments on the influence of intake conditions on local instantaneous heat flux in reciprocating internal combustion engines
[EN] The present study tries to be a contribution for the development of more precise theoretical models for predicting the dissipation of heat through the combustion chamber walls of reciprocating (internal combustion) IC engines. A fast response thermocouple was embedded in the combustion chamber...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2011 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/72912 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/72912 |
| Access Level: | acceso abierto |
| Palavra-chave: | Fast response thermocouple Instantaneous heat flux Instantaneous wall temperature Internal combustion engines Local heat flux Internal combustion Wall temperatures Air intakes Combustion chambers Engine cylinders Fast Fourier transform Heat engines Ignition Oxygen Sensitivity analysis Thermocouples Thermometers Walls (structural partitions) Heat flux Air temperature Combustion Energy dissipation Engine Experimental study Fourier transform Numerical model MAQUINAS Y MOTORES TERMICOS |
| Resumo: | [EN] The present study tries to be a contribution for the development of more precise theoretical models for predicting the dissipation of heat through the combustion chamber walls of reciprocating (internal combustion) IC engines. A fast response thermocouple was embedded in the combustion chamber of a single cylinder engine to measure instantaneous wall temperatures. The heat flux was obtained by solving the one-dimensional transient energy equation with transient boundary conditions using the Fast Fourier Transform. The engine was tested under different operating conditions to evaluate the sensitivity of the measurement procedure to variations of three relevant combustion parameters: injection pressure, air temperature and oxygen concentration at the intake. The local heat flux obtained was compared with other relevant parameters that characterize the thermal behaviour of engines, showing, in most of the cases, correlation among them. The results showed that the instantaneous heat flux through the walls and hence the local wall temperatures are strongly affected by the ignition delay and the start of combustion. © 2010 Elsevier Ltd. |
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