Characterization of under-hood airflow in construction equipment using experimental techniques

This thesis investigates the effects of hot air accumulation beneath the hood in excavator-type construction machinery during engine operation and proposes a practical design solution to improve airflow. Accumulated thermal energy under the hood negatively impacts the operational efficiency of the engine and surrounding components, potentially leading to reduced performance and shorter component lifespan over time. To address this issue, ventilation openings were strategically added to the hood structure, allowing heated air to be directed outward more effectively.The study not only evaluates the thermal improvement achieved through these modifications but also considers the impact on noise emission.Noise measurements were conducted according to relevant standards, and the results were analyzed to determine whether the values remained within legally acceptable thresholds.The findings demonstrate that the addition of ventilation vents effectively reduced the under-hood temperature, contributing to better thermal management. At the same time, the noise levels recorded after the modification were observed to remain within permissible limits. These results suggest that it is possible to enhance thermal flow characteristics without compromising compliance with environmental noise regulations. Keywords: Under-Hood Flow, Thermal Management, Noise Measurement, Thermal Analysis, Construction Machinery,