Icing will destroy the original aerodynamic shape of the aircraft, and the flow field on the aircraft surface shows strong unsteady, nonlinear and random characteristics under icing conditions. We analyze the coupling characteristics of aerodynamics / flight dynamics of background aircraft under icing conditions, proposing a two-way coupling solution strategy, and developing an integrated numerical computing platform for the unsteady flow solver and flight dynamics simulation software. The effectiveness of the coupling algorithm is verified through standard examples, and the numerical simulation program is capable of simulation of unsteady flow with dynamic attitude. On this basis, the calculation and analysis of the coupling characteristics of background aircraft aerodynamics/flight dynamics with the ice accretion on the leading edge of the wing are conducted. The results show that the influence of the unsteady effect under icing conditions is reflected in the high angle of attack stage. Meanwhile, the unsteady characteristics brought by separation bubble shedding and re-incidence will cause strong pulsation of aerodynamic forces, possibly leading to aircraft loss of control. The method described in this paper lays a foundation for exploring the influence of the coupling characteristics of uncontrollable motion, flow field and aerodynamic characteristics on flight safety, exhibiting a good engineering application prospect.
WU Qiang
,
XU Haojun
,
WEI Yang
,
PEI Binbin
,
XUE Yuan
. Aerodynamics/flight dynamics coupling characteristics of aircraft under icing conditions[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022
, 43(8)
: 125566
-125566
.
DOI: 10.7527/S1000-6893.2021.25566
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