Effect of Engine Room Temperature on Air Flow Temperature inside an Automotive Air Intake System

This project is to find the effect of the engine room temperature on the airflow temperature across the air intake system as well as the effect of temperature on the pressure drop. By using the ANSYS Fluent, a simulation was done in order to come up with the results.

This project is a collaboration with Proton’s Research and Development in order to determine whether the engine room temperature will have an effect on the airflow temperature inside the Air Intake System (AIS). In addition, this project is also conducted to determine the effect of the airflow temperature towards the pressure drop across the AIS which can affect the engine performance. There are a few parameters that can affect the performance efficiency such as the pressure drop across the system and also the increase of engine room temperature which can lead to an increase of airflow temperature inside the air intake system. GayLussac’s Law states that the higher the fluid’s temperature increases, the higher the pressure drop inside the system. Hence based on this law, it clears that surrounding temperature can affect the pressure drop in that particular system. This research is a full simulation-based project that used ANSYS Fluent as the main software. A base simulation was carried out using ambient temperature in order to validate the
simulation model with measured data. Then, the simulation was to carry with three different thermal conditions which were 40, 70, 120 degree Celsius. Each of the thermal conditions was repeated with three different speeds of engine which were 5500 RPM, 4000 RPM, and 2000 RPM. Based on the simulation results, it shows that the pressure drop across the air intake system is higher when the temperature is higher. This proves that the airflow temperature does affect the pressure drop across the air intake system.

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