Systematic Research on Unsteady Problems of Aerofoil-and Hydrofoil-Cascades

最近对大型、高速或轻型涡轮机械的探索趋势产生了许多问题。例如，振动和破坏的叶片和噪音的例子。另一方面，计算机能力和测量技术取得了迅速的进步。这导致了大量关于叶栅非定常流动问题的研究工作。在这种情况下，收集和综合迄今为止发表的研究成果显得尤为重要。本系统研究的目的是收集和分析自1974年至1987年以来发表的大量关于叶栅流动非定常问题的著作。结果总结在以下10篇文章中。振荡或振动级联，2。周期振荡流中的级联；4.静转子间流动相互作用；非均匀进口流叶栅，5。叶栅内部流动与下游粘性尾迹，6。空化级联，7分。喀斯喀特的噪音，8号。叶栅非定常转捩、分离与动态失速[j]。级联的瞬态响应；非定常叶栅流动实验。它们被进一步分成几篇详细的文章。二十二名调查人员收集并分析了上述文章的各种研究论文。它们被汇总和综合在一本数据手册中。这对于认识到目前研究工作的现状，探索今后非定常叶栅流动问题的研究工作具有重要的参考价值。

Recent trends for explorations of large-size or high-speed or light weight turbo-machineries produce many provlems. For examples, vibrations and destructions of their blades and noises are exemplified. On the other hand, computer capacities and measuring techniques have made rapid progresses. It results in very large number of reasearch works on a wide variety of unstesady flow problems of the cascades. Under such a situation, it seems very important to collect and synthesize the research works published up to now.The purpose of the present systematic research was to collect and analyze a large number of the works on the unsteady problems for the cascade flow published sine 1974 to 1987. The results are summarized in the following ten aricles.1. Oscilating or vibrating Cascade, 2. Cascade in Periodically Oscilating Flow, 3. Unsterdy Flow Interaction between Stato and Rotor, 4.Cascade in Nonuniform Inlet Flow, 5. Internal Flow in Cascade and Downstream Viscous Wake, 6. Cavitating Cascade, 7. Noise from Cascade, 8. Unsteady Transition, Separation and Dynamic Stall in Cascade, 9. Transient Response of Cascade, 10. Experiment on Unsteady Cascade Flow.They were further divided into several detailed articles. Twenty-two investigators collected and analyzed a wide variety of the research papers on the articles described above. They are summarized and synthesized in a data book. It may be very valuable in order to recognize the present stage of the works and to explore the future research works on the unsteady cascade flow problems.