实践证明，拖网分离栅能够有效地提高拖网作业的选择性，降低副渔获物和抛弃，保护渔业资源，因此，许多国家通过立法使其被强制使用。
Trawl sorting grids can effectively enhance the selectivity of trawl, reduce by-catch and discards, protect fish resources, which are compulsively used in many countries by legislation.
反弯则使得叶栅内分离趋势增加，气动性能明显降低。
A negative bowed blade increases the flow separation and the flow performance is reduced remarkably.
通过数值模拟，分析了叶片周向弯曲对大折转角压气机叶栅内分离结构的影响。
A numerical simulation was performed to analyze the effect of bowed blades on the separation structures in a high-turning compressor cascade.
根据计算结果对大负攻角条件下叶栅二维分离流动的特点以及攻角对叶栅气动特性的影响进行了分析。
According to the obtained results, the behavior of the separation flow and the effects of negative incidences on the aerodynamic characteristics of cascade are analyzed.
本文针对非设计工况下叶栅的分离流动进行研究。
This paper focuses on the unsteady characteristic of cascade separation flow under off-design condition.
结果表明：对于大分离叶栅，在靠近吸力面的端壁上进行附面层抽吸可以获得最佳效果。
The result showed that for the cascade with larger separation, perfect effects can be obtained by applying boundary layer suction on the end-wall near suction surface.
阐述了在环形扩压叶栅内利用非定常激励减少分离区损失的实验研究成果。
This paper presents the results of the experimental investigation on the effects of internal acoustic excitation on enhancing performance of the annular cascade.
此外，通过对振荡叶栅非定常流场结构的研究，发现了叶片吸力面气流分离与叶片振动之间的耦合关系。
Through studying the structure of the unsteady flow field in vibrating cascades, the coupling relationship between flow separation on the suction surface and blade vibration is revealed.
此外，通过对振荡叶栅非定常流场结构的研究，发现了叶片吸力面气流分离与叶片振动之间的耦合关系。
Through studying the structure of the unsteady flow field in vibrating cascades, the coupling relationship between flow separation on the suction surface and blade vibration is revealed.
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