控制水轮机锥形扩散器旋流不稳定性的被动技术综述

IF 12.2 1区 工程技术 Q1 MECHANICS
C. Tănasă, A. Bosioc, A. Stuparu, S. Muntean, R. Susan-Resiga
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引用次数: 3

摘要

这篇论文是对作者十多年来取得的成果的一个令人欢迎的综合。这种方法完全合理的原因在于水轮机锥形扩散器减速旋流控制技术的新颖性。本文的研究结果严格地指旋流不稳定性的新型被动控制技术。虽然这些新技术的成果已在各种论文中传播,但很难从一系列文章中概述概述。因此,本文实现了一个受欢迎的统一综合,对涡轮机械流体力学领域的专家有用。涡轮机制造商对使用外部/额外能源的主动控制技术的不情愿,导致我们选择被动控制技术,特别是在过去几年开发的技术。本文第一部分分析了专业文献,其中包括减轻水轮机下游减速旋流自致失稳的各种被动解决方案。这种固有的不稳定性在远离最佳运行状态时强烈表现出来,是现代水轮机面临的挑战之一。缓解这些不稳定性是一个悬而未决的问题,到目前为止,还没有一致接受的技术解决方案在原型涡轮机上实施。论文的第二部分包括对流量反馈轴向注水的详细研究,以及在锥形扩散器中使用可调隔膜的最新方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Perspective Review of Passive Techniques Applied to Control the Swirling Flow Instabilities From The Conical Diffuser of Hydraulic Turbines
This paper represents a welcome synthesis of the results obtained by the authors over more than a decade. The reason why such an approach is perfectly justified is found in the novelty of the control techniques of decelerated swirling flows from the conical diffuser of hydraulic turbines. The results presented in this paper refer strictly to the new passive control techniques of the swirling flows instabilities. Although the results of these new techniques have been disseminated in various papers, it is difficult to outline an overview from a collection of articles. Therefore, the present paper achieves a welcome unitary synthesis, useful to specialists in the field of turbomachines hydrodynamics. The reluctance of the turbine manufacturers on active control techniques that use external/additional energy source, led us to the choice of passive control techniques review, especially the ones developed in the last years. The first part of the paper analyzes the specialized literature that includes a variety of passive solutions for mitigating self-induced instabilities of decelerated swirling flow downstream of hydraulic turbines. Such inherent instabilities manifest intensely at far from optimal operating regimes, and represent one of the challenges of modern hydraulic turbines. The mitigation of these instabilities is an open problem, so far there are no unanimously accepted technical solutions implemented on prototype turbines. The second part of the paper includes detailed investigations on axial water injection with flow-feedback, but also more recent approaches using adjustable diaphragm in the conical diffuser.
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来源期刊
CiteScore
28.20
自引率
0.70%
发文量
13
审稿时长
>12 weeks
期刊介绍: Applied Mechanics Reviews (AMR) is an international review journal that serves as a premier venue for dissemination of material across all subdisciplines of applied mechanics and engineering science, including fluid and solid mechanics, heat transfer, dynamics and vibration, and applications.AMR provides an archival repository for state-of-the-art and retrospective survey articles and reviews of research areas and curricular developments. The journal invites commentary on research and education policy in different countries. The journal also invites original tutorial and educational material in applied mechanics targeting non-specialist audiences, including undergraduate and K-12 students.
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