| URN | etd-0717123-133831 | Statistics | This thesis had been viewed 38 times. Download 3 times. |
| Author | An-lei Yeh | ||
| Author's Email Address | stone19111010@gmail.com | ||
| Department | Institute Of Mechanical Engineering | ||
| Year | 2022 | Semester | 2 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 43 |
| Title | Simulation Analysis on the Aerodynamic Performance of Automobiles Equipped with Rear Spoilers | ||
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| Abstract | The rear spoiler of an automobile serves to reduce the lifting force exerted on the rear end of the car. The tilting angle of the spoiler drives the passing air down to create a downward pressure. Without a rear spoiler, the lifting force on the rear part of the car will be greater than on the front, which leads to a decrease in rear-tire grip and then reduces the stability of the car when moving in high speed. This thesis utilized Ansys Fluent to perform fluid flow simulation on simplified models of a Toyota AE86 sports car equipped with various types of rear spoilers. This research simulated the effects of rear spoilers of various shapes, angles of attack, horizontal and vertical positions on the drag and lift forces of the automobile. The aerodynamic performance of the models, moving in speeds of 72 km/h and 120 km/h, with a total of 23 types of rear spoilers were studied to find the best model capable of reducing drag and lift forces, increasing downward pressure and enhancing tire grip and driving stability. Among various designs, the model with the Cross-section C type spoiler produced the least lift coefficient; the Cross-section A type model created the smallest drag coefficient; the 40˘Xangle of attack model provided the minimum lift coefficient; while the spoilersĦĤhorizontal position of 150 mm and vertical position of 120 mm respectively yielded the best lift coefficient. |
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| Files | indicate in-campus access immediately and off-campus access at 5 years | ||
| Date of Defense | 2023-07-05 | Date of Submission | 2023-07-17 |