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Session: Poster session & drinks
Session starts: Tuesday 18 June, 18:00
Presentation starts: 18:14
Room: Room 1.1

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Ruijie Niu (School of Aeronautic Science and Engineering, Beihang University)
Changchuan Xie (School of Aeronautic Science and Engineering, Beihang University)
Zhitao Zhang ()
Chao An (School of Aeronautic Science and Engineering, Beihang University)

Abstract:
The aerodynamic and aeroelastic analysis on the propeller-wing tractor configurations has gained a lot of focus as the rapid development of electric distributed propulsion vehicles. Complex aerodynamic and structural couplings of propeller-wing system must be modelled properly and solved together as an aeroelastic problem, especially for flexible wings. Low to medium fidelity approaches remain popular due to high precision methods (CFD) are still expensive for aeroelastic problems. The Unsteady Vortex Lattice Method (UVLM) can relatively guarantee accuracy with less effort and has the ability to consider aerodynamic interference between wing and propellers. In this paper, a unified framework is presented to analyse the aerodynamic and aeroelastic of propeller-wing system with two paralleling propellers, providing the basis for further studies of distributed propulsion wing. The wing, propellers and their wakes are modelled meanwhile based on UVLM to capture the mutual aerodynamic interference without empirical formulations. Vortex strengths can be determined by boundary condition: (1) Numeric comparisons with the RANS (Reynolds-averaged Navier-Stokes) approach is made both on the two isolated propellers and the proposed system. As for structural analysis, propellers are considered as rigid bodies while wing is modelled by linear finite element model. The aerodynamic and structural models are loose coupled to calculate the aeroelastic response in time-domain. Examples are also included to illustrate the usefulness of the proposed method. In the future, we will investigate the effect of relative parameters on the stability of the propeller-wing system, such as numbers, locations and rotational directions (same or opposite) of propellers and so on. Gaining a deeper insight into the aerodynamic performance, vibration, stability, control and noise of the coupled system is also a challenging task.