![]() ![]() Buffet is highly dependent on aircraft geometry flow can separate from aircraft wings or can be affected by external structures such as weapons bay doors, antennae, and weapons stores, causing the turbulent flow to impinge structures in its wake. Due to its dynamic nature, buffet loads have historically been difficult to numerically model due to the complex structural and aerodynamic non-linearities. Turbulent flow, normal shocks, and stall can cause flow to separate from the wing, possibly leading to a buffet response in the wing itself, the fuselage and the empennage as unsteady flow excites a dynamic response from these surfaces. A variety of flight conditions and aircraft configurations can lead to buffet loading events. OBJECTIVE: Develop an innovative loads prediction methodology that combines analytical and test-derived data models and utilizes aircraft state variables along with existing aircraft instrumentation data to predict airframe structural loads due to buffet for in-service fixed wing aircraft.ĭESCRIPTION: Buffet is a complex load source characterized by random pressure oscillations on aircraft structure caused by unsteady airflow.
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