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

近年来，涡轮机械向大型化、高速化、轻量化方向发展，但也存在许多问题。举例说明了叶片的振动和破坏以及噪声。另一方面，计算机能力和测量技术也取得了迅速发展。这就导致了对叶栅各种非定常流动问题的大量研究工作。在这种情况下，收集和综合迄今为止发表的有关叶栅非定常问题的研究工作显得十分重要，本文的目的是收集和分析1974年至1987年发表的大量有关叶栅非定常问题的研究工作。结果总结为以下十个方面。振荡或振动级联，2。周期性振荡流中的叶栅，3。静叶和动叶之间的非定常流干扰，4。非均匀进气中的叶栅，5。叶栅和下游粘性尾流中的内部流动，6。第七章.噪音从级联，8。叶栅非定常转捩、分离和动态失速，9.叶栅的瞬态响应，10。叶栅非定常流动的实验研究，并进一步分为几篇详细的文章。22名研究人员收集并分析了关于上述文章的各种研究论文。这些数据在一本数据手册中进行了总结和综合。这对于认识叶栅非定常流动问题的研究现状和探讨今后的研究方向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.