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据报道,R·R公司最近设计了一台“复合”掠形叶片的风扇。该风扇叶片设计与美国GE公司和P&W公司的有些不同。它采用形同短弯刀曲率(先后掠,叶尖处再前掠)的前缘设计,使进入发动机的气流沿叶片展向平稳地减速,而不是突然地减速,在叶尖处转变为超音速。激波是分级的,不会对准叶尖,从而减少叶片损失,提高了效率。该叶片采用R·R公司成熟的超塑成形/扩散焊接的宽弦空心叶片结构,大大减轻了重量,同时增强了抗鸟撞能力。预计该
It has been reported that R.R. recently designed a “composite” swept-blade fan. The fan blade design and the United States GE and P & W companies are somewhat different. It adopts the leading edge design which is similar to the curvature of the scimitar (sweep forward and then swept at the tip), so that the airflow entering the engine steadily decelerates along the blade, instead of suddenly decelerating and transforms into super Sonic speed. Shock is graded, will not be aimed at the tip, thus reducing the blade loss and improve efficiency. The blade uses R.R.’s sophisticated superplastic forming / diffusion welding wide-chord hollow blade structure, greatly reducing the weight, while enhancing the anti-bird strike capability. Expected that