A blended-wing-body aircraft has the advantages of high lift-to-drag ratio, low noise, and high economy compared with traditional aircraft. It is currently a solution with great potential to become a future civilian passenger aircraft. However, most airplanes with this layout use distributed power, and the power system is on the back of the fuselage, with embedded or back-supported engines. This type of design causes the boundary layer suction effect. The boundary layer ingestion (BLI) effect can fill the wake of the aircraft and improve the propulsion efficiency of the engine. However, it causes huge design difficulties, especially when the aircraft and the engine are strongly coupled. In this paper, an aircraft with a coupled engine configuration is studied. The internal and external flow fields are calculated through numerical simulation. A realistic calculation model is obtained through the coupling of boundary conditions. On the basis of the influence of the external flow on the internal flow under the coupled condition, the influence of the BLI effect on the aerodynamic performance of the fan is investigated.

中文翻译：

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分布式推进系统融合翼飞机动力风扇设计

翼身融合飞机与传统飞机相比，具有升阻比高、噪音低、经济性高等优点。目前是一种很有潜力成为未来民用客机的解决方案。但是，这种布局的飞机大多采用分布式动力，动力系统在机身背面，带有嵌入式或后支撑式发动机。这种类型的设计会产生边界层吸力效应。边界层吸入（BLI）效应可以填充飞机的尾流，提高发动机的推进效率。然而，它带来了巨大的设计困难，尤其是当飞机和发动机强耦合时。在本文中，研究了具有耦合发动机配置的飞机。通过数值模拟计算内外流场。通过耦合边界条件，得到一个现实的计算模型。在耦合条件下外流对内流影响的基础上，研究了BLI效应对风机气动性能的影响。