Date of Award
Master of Science
The issue of noise generation in tractors is a problem of great interest to the farm equipment industry, both in the United States and in Europe. Legislation regulating noise generation is becoming increasingly restrictive and necessitates that companies continuously work to improve the noise performance of their products if they are to remain competitive. One of the main sources for sound generation in an engine is the cooling unit. The cooling unit consists of both the radiator and cooling fan. To gain insight into strategies for noise reduction, particle image velocimetery (PIV) was used to study the airflow in an engine cooling package with an axial cooling fan. The flow field was investigated upstream and downstream of the fan. Data was collected at five different fan positions as one blade passed. Two different engine speeds, two different shroud types, and two different engine block spacings were examined to find their impact on the flow field. Velocity (m/s) was collected using PIV. Momentum (N-s) and turbulent kinetic energy (TKE) (1/s) data was calculated using the velocity data. This data was used to identify what impact each parameter had on the flow field. It was found that the engine block spacing had the biggest impact on both the upstream and downstream velocity flow fields. In the upstream flow,
Paul J Melzer
Melzer, Paul J., "Particle image velocimetry study of an axial cooling fan and the interaction of downstream obstructions" (2006). Retrospective Theses and Dissertations. 19341.