Application of CoFlow Jet methodology for rear wing flow control in high-performance vehicles

This research investigates the application of the Co-Flow Jet (CFJ) active flow control technique to a high-performance vehicle, combining CFD simulations and on-track experimental testing on a modified moving rear wing installed on a McLaren 765LT vehicle. The CoFlow system demonstrated drag reductions up to 17% and downforce increases up to 54% under specific operating conditions, with the E8FB configuration achieving the best aerodynamic and energetic performance. Results show that the most efficient operating range occurs at intermediate fan speeds (50–85% RPM), while excessive actuation leads to over-energization and flow instability. The study also highlights the limitations of RANS-based CFD in predicting flow separation at high angles of attack, suggesting that unsteady models such as LES or DES should be used for future investigations. Overall, the results confirm the potential of the CoFlow Jet methodology as a viable active flow control system for high-performance vehicles, providing measurable aerodynamic advantages with moderate energy requirements. Further optimization of duct geometries and actuation strategies is recommended to fully exploit its potential for production-ready automotive applications.