Macan Goes BEV. Aerodynamics of the First All-Electric Porsche SUV

How does one take the Porsche model that has been the top-seller six times since 2015 and transition it into the e-mobility era? How does one combine its classic Porsche themes – its quintessential design language and track suitability – with modern customer demands like range and consumption? How does one reduce drag by 30% while retaining the identity of the vehicle? Or to frame the question differently: what were the aerodynamic challenges of the new Porsche Macan, the brand’s first all-electric SUV with the least drag? The aerodynamics of the electric Macan were designed using state-of-the-art tools. The basic shape of the vehicle was defined and optimised in a scale model wind tunnel. In a state-of-the-art, full-scale aeroacoustic wind tunnel, further refinements to the vehicle shell and other technical details were made right down to the start of production in collaboration with the designers. Simultaneous to the measurements in the wind tunnels, the entire aerodynamic development process was supported by detailed flow simulations (CFD). The aerodynamic improvements and technical measures implemented reduce the drag coefficient by delta cD = −0.10 from the previous value of cD = 0.35 to cD = 0.25. This corresponds to an increase in range of around 85 km in the standardised fuel consumption cycle for Europe (WLTP). Development of the basic form focused on the roofline, which drops off coupé-like by way of the rear window. The rear section is capped by the active rear spoiler which, in combination with the flaps of the fully closable air intake in the front of the vehicle, makes it possible to have both efficient, range-orientated travel as well as sporty, performance-focused driving. Other major contributors to reducing drag include the aerodynamically optimised wheels and tyres and the largely closed underbody with its flexible suspension fairings.