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Mathematics 2019, 7(2), 116; https://doi.org/10.3390/math7020116

Numerical Simulation of Rotor–Wing Transient Interaction for a Tiltrotor in the Transition Mode

1,2
,
1
and
1,*
1
School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
2
Institute of Aerodynamics and Gas Dynamics, University of Stuttgart, 70569 Stuttgart, Germany
*
Author to whom correspondence should be addressed.
Received: 26 November 2018 / Revised: 2 January 2019 / Accepted: 17 January 2019 / Published: 22 January 2019
(This article belongs to the Section Engineering Mathematics)
Full-Text   |   PDF [5295 KB, uploaded 24 January 2019]   |  

Abstract

Tiltrotor aerodynamic interaction, especially in the transition mode, is a necessary consideration for tiltrotor aerodynamics, and structural design and optimization. Previous studies have paid much attention to the helicopter mode. However, due to the substantial complexity of the problem, only a small amount of work on the transition mode has been done so far. In this paper, the rotor–wing aerodynamic interaction of a scaled V-22 Osprey tiltrotor, both in the helicopter and transition modes, are studied by computational fluid dynamics (CFD) numerical simulation. The flow field is discretized via the chimera mesh technique and then solved with the Reynolds-averaged Navier–Stokes (RANS) equations. The rotational acceleration of the rotor is considered as a source term added on the right side of the momentum equation of the RANS equations. Both a quasi-steady and a fully transient method are employed to simulate the tilt motion of the rotor in the transition mode. Both qualitative and quantitative results are presented and discussed on the aerodynamic forces, flow physics, and mechanisms. The applicability of the extensively used quasi-steady method for rotor tilt simulation is revealed. View Full-Text
Keywords: computational fluid dynamics; tiltrotor; aerodynamic interaction; transition mode; chimera mesh computational fluid dynamics; tiltrotor; aerodynamic interaction; transition mode; chimera mesh
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Wu, Z.; Li, C.; Cao, Y. Numerical Simulation of Rotor–Wing Transient Interaction for a Tiltrotor in the Transition Mode. Mathematics 2019, 7, 116.

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