Large ground transportation systems such as trucks, trains and busses are a main source of pollution, increase the severity of global warming and are main users of expensive and vanishing fossil fuels. At large allowable speeds the aerodynamic drag is a main source for reduced effectiveness and increased energy consumption of large ground transportation systems. When part of these vehicles suffers from boundary layer separation (such as the rear region of large trucks), and proper aerodynamic design is not an option (due to functionality considerations) one needs to come up with non-traditional solutions.

This talk will describe such a path to reduced drag. The concept is based on a simple and small “add-on” device that should be attached to the rear region of trucks. The device houses the newly developed suction and oscillatory blowing actuator, in order to deflect the boundary layer and delay its separation from the device. The static pressure at the truck “base” is increased this way, reducing the aerodynamic drag. Due to the great efficiency and no-moving parts nature of the actuator, increase of net energy efficiency is achievable.

Referent:
Prof. Avraham ("Avi") Seifert, Tel-Aviv University
Eingeladen von Prof. Dr. A. Dillmann

Veranstaltungsort:
Standort Göttingen, Ludwig-Prandtl-Saal (Hörsaal Haus 7, EG)
Bunsenstr. 10
37073 Göttingen