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4 Οκτ 2024 · A high-speed buffet, also known as Mach buffet, occurs when an aircraft approaches or exceeds its critical Mach number. This phenomenon is caused by the airflow over the wings becoming turbulent, leading to a loss of control effectiveness and stability.
Mach buffet is a function of the speed of the airflow over the wing—not necessarily the speed of the aircraft. Any time that too great a lift demand is made on the wing, whether from too fast an airspeed or from too high an AOA near the M MO , the “high-speed” buffet occurs.
A given airspeed, divided by the speed of sound in that air, gives a ratio known as the Mach number. A Mach number of 1.0 indicates an airspeed equal to the speed of sound in that air.
11 Απρ 2017 · Turbulent flow develops behind the wing, causing a buffet called mach buffet. You can also experience mach tuck after you pass the critical mach number. The supersonic air flowing past the leading edge of the wing generates far more lift than the subsonic (and often stalled) air aft of the shock wave.
3 Απρ 2018 · The turbulent air may be completely external (weather) or created by the aircraft it self (prop, wing,etc). The most common form of buffeting is turbulent airflow over a wing (i.e. during a stall or wind gusts) striking the wing or horizontal tail.
8 Ιαν 2016 · Buffet is a kind of vibration caused by aerodynamic excitation, usually associated with separated (or turbulent) airflow. As the aircraft approaches stall, the airflow over the wing becomes turbulent and if it flows across the horizontal stabilizer, buffeting may occur.
In aviation, coffin corner (or Q corner) refers to the point at which the Flight Envelope boundary defined by a high incidence stall intersects with that defined by the critical Mach number.
