Performance, Aerodynamics, and Aeroacoustics of Side-by-Side Rotors Using High-Fidelity Computational Fluid Dynamics

被引:4
作者
Sagaga, Jared [1 ]
Lee, Seongkyu [1 ]
机构
[1] Univ Calif Davis, Dept Mech & Aerosp Engn, Davis, CA 95616 USA
关键词
Computational Fluid Dynamics; Interactional Aerodynamics; Overall Sound Pressure Level; Urban Air Mobility; Side-by-Side Rotor; Rotorcraft; Blade Vortex Interaction; SOUND;
D O I
10.2514/1.J062955
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
This paper investigates the performance, aerodynamics, and aeroacoustics of NASA's side-by-side urban air mobility (UAM) aircraft in hover conditions, utilizing high-fidelity computational fluid dynamics (CFD) simulations. High Performance Computing Modernization Program CREATE & TRADE;-AV Helios is employed for the CFD simulations, while acoustic predictions are performed by PSU-WOPWOP. The simulations apply overset structured grids, the Spalart-Allmaras detached eddy simulation turbulence model, and adaptive mesh refinement (AMR) on the off-body mesh. The investigation covers four rotor overlap scenarios and five collective pitch angles, all maintaining a consistent rotational speed. Results indicate that as rotor overlap distance increases, a minor improvement in the figure of merit is noticed. Nevertheless, a substantial reduction in blade loading within the overlap region becomes apparent. The blade-vortex interaction (BVI) intensifies between both rotors as the overlap region broadens. The 25% overlap configuration is shown to yield the highest overall sound pressure level (OASPL) among all configurations due to the more pronounced BVIs at the entrance and exit of the overlap area. It is observed that the OASPL exceeds 62 dBA at an altitude of 500 ft (152.4 m) for all overlap cases, exceeding the suggested UAM aircraft noise guideline. Additionally, noise generated by all overlap scenarios is compared against various background noise levels. Results suggest that the noise produced by the side-by-side rotor configuration is not fully masked by any of the different background noise levels at an altitude of 500 ft (152.4 m).
引用
收藏
页码:5429 / 5445
页数:17
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