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首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >Predicting Rotor BVI Loads Inclusive of the Fuselage Effect using an Unstructured Mesh Technique
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Predicting Rotor BVI Loads Inclusive of the Fuselage Effect using an Unstructured Mesh Technique

机译：使用非结构化网格技术预测包括机身效应在内的BVI负载

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摘要

Viscous flow simulations of the HART II rotor were conducted using a flow solver based on unstructured meshes. To capture the blade-vortex interaction (BVI) phenomena accurately, a series of solution-adaptive mesh refinements was carried out. The blade deformation was considered using the HART II rotor measurement. Calculations were made for isolated-rotor and rotor-fuselage configurations, to investigate the fuselage effect on the blade loading and the rotor wake structure. The inclusion of fuselage significantly improves the trim control prediction, which results from the more accurate prediction of rotor inflow at the front and rear portions of the rotor disk. This improved trim control also leads to an improvement in the blade loading prediction for the rotor-fuselage configuration. From the solution-adaptive mesh refinement study, it was found that high-frequency blade loading caused by BVI can be obtained more accurately as the mesh is further refined, whereas the low-frequency loading is mostly independent to the mesh resolution. The predicted vortex core positions at the retreating side of the rotor were well matched with measurements, whereas a relatively large difference between the prediction and the measurement was observed at the advancing side.
机译：使用基于非结构化网格的流量求解器对HART II转子进行了粘性流动模拟。为了准确地捕获叶片-涡旋相互作用（BVI）现象，进行了一系列解决方案自适应网格细化。使用HART II转子测量来考虑叶片变形。对隔离式转子和转子-机身结构进行了计算，以研究机身对叶片载荷和转子尾流结构的影响。机身的内含物显着改善了配平控制预测，这是由于更准确地预测了在转子盘前部和后部处的转子流入所致。这种改进的修整控制还导致转子机身配置的叶片载荷预测得到改善。从支持解的网格细化研究中发现，随着网格的进一步细化，由BVI引起的高频叶片载荷可以更准确地获得，而低频载荷主要与网格分辨率无关。转子后退侧的预测涡流芯位置与测量值很好地匹配，而在前进侧则观察到了预测值与测量值之间的较大差异。

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