Strömungsabriss

Strömungsabriss, often translated as stall in English, is a phenomenon that occurs in fluid dynamics when the flow of the fluid over a surface separates from that surface. This separation typically happens when the angle of attack, the angle between the oncoming flow and the chord line of an airfoil or wing, becomes too large. As the angle of attack increases, the air pressure on the upper surface of the wing rises, and the air velocity decreases. Eventually, the airflow can no longer follow the contour of the wing and detaches, creating turbulent eddies and a significant reduction in lift.

The consequences of strömungsabriss depend on the context. In aviation, a stall can lead to a loss of lift and a sudden drop in altitude, which can be dangerous if not managed properly. Pilots are trained to recognize and recover from stalls. In other applications, like the operation of wind turbines, strömungsabriss can be a design consideration to control power output or prevent structural damage under high wind conditions. The exact point at which strömungsabriss occurs is influenced by factors such as the shape of the object, the speed of the fluid, and the surface condition. Understanding and predicting strömungsabriss is crucial for the design and safe operation of many engineered systems involving fluid flow.