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Figure 4.11 Absolute Pressure of LMV with Vortex Generator Since the VG could be in varying geometries, we simulate the LMV with added VG at different install positions and shapes as shown in Figure 4.11. Since the main function of VG is to delay the airflow separation, we install the VG 130 mm from the rear end, a little bit ahead of the previous one. The CFD simulation yields that a drag coefficient Cd equals to 0.511 and a lift coefficient Cl equals to -0.052. Fuel economy is estimated about 0.22 decreases. By comparing Figure 4.11 to Figure 4.2 that there is insignificant effect of wake region in the back. However, it generates a small wake region after the VG that produces drag and lift. From the simulation results, it indicates that the VG does not generate an aerodynamic improvement for this type of vehicles. For a regular sedan, it is common to see that a VG is installed before on the rear end. The reason that it does not work for SUV or crossover type vehicle might be that the flow separation of the SUV and crossover is at the rear end but there is not any body part like chunk of sedan to collaborate with the VG.. 
Figure 4.12 LMV with Revised VG Directory: bitstream -> handle handle -> Online Genealogical Resources in the Digital Library of Georgia handle -> Master of science handle -> Healthcare utilization among persons living with hiv with attention to the influences of hepatitis handle -> The Economics of Technology Sharing: Open Source and Beyond Josh Lerner and Jean Tirole handle -> A dissertation handle -> The Rise of Digital Curation and Cyberinfrastructure: From Experimentation to Implementation, and Maybe Integration handle -> Mobile augmented reality applications for library services handle -> Libraries, Archives, and Museums as Epistemic Infrastructure1 Download 6.31 Mb. Share with your friends:
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