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1 results

  • Flow simulation of the flight manoeuvres of a large transport aircraft with load alleviation

  • C. Breitenstein, R. Radespiel
  • Journal:
    The Aeronautical Journal / Volume 126 / Issue 1298 / April 2022
    Published online by Cambridge University Press:
    28 October 2021, pp. 681-709

  • A new method for predicting manoeuvre loads on a large transport aircraft with a swept-back wing and a load alleviation system based on control surface deflections is developed. For this purpose, three-dimensional Reynolds-averaged Navier–Stokes (RANS) simulations of the rigid wing–fuselage configuration are performed while the aerodynamics of the tailplane are estimated by means of handbook methods. For a closer analysis, different quasi-steady pitching manoeuvres are chosen based on the CS-25 regulations. One of these manoeuvres is also simulated with active load alleviation, leading to a reduction in the wing-root bending moment by more than 40%. Besides demonstrating the potential of the considered load alleviation system, it is shown which manoeuvres are especially critical in this context and which secondary effects come along with load alleviation.