Simulation of Flow around a Bus with Passive Drag Reduction Attachments

• Main Author: Mat Zuki, Ikhwan Solihin
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi PETRONAS 2009
• Subjects: TJ Mechanical engineering and machinery
• Online Access: http://utpedia.utp.edu.my/9134/1/2009%20-%20Simulation%20of%20Flow%20Arround%20a%20Bus%20Passive%20Drag%20Reduction%20Attachments.pdf; http://utpedia.utp.edu.my/9134/

In this study, a numerical simulation has been carried out for three-dimensional turbulent flows around a bluff-based bus-like body and actual bus body. The first step ofthis study is to verify the effectiveness of the CFD analysis. In the second step, to reduce the drag of the actual bus model, parameter studies are performed with attention to effective utilization ofthe rear-spoiler equipped at the roof-end of upper body. . The study is being conducted to get clear view on how the aerodynamics changes when attaching attachments (spoiler) to reduce the aerodynamic drag for the buses. The effect of a rear-spoiler attached at the rear end of the bus body will be investigated. At the early stage, it is crucialto seek for relevant information regarding the project. Previous experiments report, journals, books and all supporting information will be reviewed for the mean of having clear view on this topic. In the design stage, calculations, modeling, and experiments will takes place. Simulation with computational fluid dynamics (CFD) software will produce initial data before experiments conducted. Similarity between model and prototype must be obtained as it is very importantto maintainthe accuracy of the data gained from experiments. Few series of experiments conducted in regards of a different shape of attachments. The drag force primary data as minimizing it result in increasing the aerodynamic performance for buses. All the results will be interpreted and discussed. Towards the end of this semester the models of bus with passive drag reduction attachments finalized. Final reports and presentations conducted as the research completed. All the objectives are expected to be met during the project. IV