混合翼身布局客机SAX-40水上迫降力学性能数值研究

doi:10.7527/S1000-6893.2013.0179

Abstract

Abstract:

The planned ditching of aircraft SAX-40 on calm water is numerically simulated to investigate the ditching performance of the hybrid wing-body configuration. The unsteady Reynolds-averaged Navier-Stokes (URANS) equations and the Realizable κ-ε turbulence model are solved by a fluent solver. The relative motion between the aircraft and water is handled by the dynamic mesh method. The air-water interface is tracked by a volume of fluid (VOF) model. During the ditching process, the impact brings about the positive pressure peak on the aircraft's lower surface near the waterline; and the planing brings forth the negative pressure on the aft curved portion of the aircraft's lower surface, resulting in a suck force and a strong nose-up pitch motion. As the aircraft touches the water, the normal load increases rapidly to 2.87G, and the longitudinal load to 1.05G. The slamming pressure reaches a peak of about 720 kPa. This airplane bounces up from the water and this defective performance should be considered during the design of a hybrid wing-body configuration.

Key words: hydrodynamics, ditching, finite volume method, transport aircraft, multiphase flow, water impact, hybrid wing-body configuration

CLC Number:

V271.1
V212

GUO Baodong, QU Qiulin, LIU Peiqing, ZHOU Zhijie, ZHANG Chun. Ditching Performance of Silent Aircraft SAX-40 in Hybrid Wing-body Configuration[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(11): 2443-2451.

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Ditching Performance of Silent Aircraft SAX-40 in Hybrid Wing-body Configuration

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