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首页> 外文期刊>The Aeronautical Journal >Enhancement of thrust reverser cascade performance using aerodynamic and structural integration
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Enhancement of thrust reverser cascade performance using aerodynamic and structural integration

机译：通过空气动力学和结构整合增强推力反向器级联性能

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摘要

This paper focuses on the design of a cascade within a cold stream thrust reverser during the early, conceptual stage of the product development process. A reliable procedure is developed for the exchange of geometric and load data between a two dimensional aerodynamic model and a three dimensional structural model. Aerodynamic and structural simulations are carried out using realistic operating conditions, for three different design configurations with a view to minimising weight for equivalent or improved aerodynamic and structural performance. For normal operational conditions the simulations show that total reverse thrust is unaffected when the performance of the deformed vanes is compared to the un-deformed case. This shows that for the conditions tested, the minimal deformation of the cascade vanes has no significant affect on aerodynamic efficiency and that there is scope for reducing the weight of the cascade. The pressure distribution through a two dimensional thrust reverser section is determined for two additional cascade vane configurations and it is shown that with a small decrease in total reverse thrust, it is possible to reduce weight and eliminate supersonic flow regimes through the nacelle section. By increasing vane sections in high pressure areas and decreasing sections in low pressure areas the structural performance of the cascade vanes in the weight reduced designs, is improved with significantly reduced levels of vane displacement and stress.
机译：本文重点研究在产品开发过程的早期概念阶段内在冷流推力反向器内的级联设计。开发了一种可靠的程序，可以在二维空气动力学模型和三维结构模型之间交换几何和载荷数据。空气动力学和结构模拟是针对三种不同的设计配置，使用实际工况进行的，目的是最大程度地减少重量，以实现等效或改进的空气动力学和结构性能。对于正常的运行条件，仿真显示，当将变形叶片的性能与未变形的情况进行比较时，总反向推力不受影响。这表明在所测试的条件下，叶栅叶片的最小变形对空气动力效率没有明显影响，并且存在减轻叶栅重量的空间。对于两个附加的叶栅叶片构型，确定了通过二维反推力部分的压力分布，结果表明，在总反推力减小很小的情况下，可以减轻重量并消除通过机舱部分的超音速流态。通过增加高压区域中的叶片截面并减少低压区域中的截面，轻量化设计中的叶栅叶片的结构性能得到改善，同时叶片位移和应力水平显着降低。

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