Simulation of Interaction of Aircraft with Gust and Resolved LES-Simulated Atmospheric Turbulence

Conventionally for computation of aircraft performance uniform parallel flow at the far field of the simulation method is assumed and disturbances as present in the real earths atmosphere are neglected. To study and to recognize challenging aspects of the interaction of aircraft with disturbed oncoming flow two different simulation methods are developed and solutions computed are compared. The first method models the atmospheric disturbance, simulates the influence of this disturbance on the aircraft however neglects influence of the aircraft on the atmospheric disturbance. The second high-fidelity method resolves the disturbed oncoming flow and simulates full two-way interaction between disturbed atmosphere and the flying aircraft. Solutions computed are used to cross-check the predictions. The high-fidelity method is then used to simulate flight through resolved atmospheric turbulence.