Chapter 40 Research on Factors Leading to Variant Aerodynamic Drag Coefficient of Different Cabriolets

摘要

Aerodynamics simulations on different types of cabriolets and a coupe were performed by utilizing the valid numerical simulation model in commercial CFD code FLUENT. The validation was verified by using the international standard MIRA reference model. By analysing eddy dissipation, flow separation scale and pressure variation in the flow field, the reasons for variable aerodynamics drag coefficient for different cars listed in this paper were found. Research has confirmed that eddy dissipation, flow separation scale and pressure variation in the flow field all have an impact on aerodynamics drag and decreasing eddy dissipation and flow separation scale, increasing cabin pressure the cabriolet can effectively lower the aerodynamic drag coefficient of cabriolets.