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首页> 外文会议>ASME Turbo Expo vol.6 pt.A; 20050606-09; Reno-Tahoe,NV(US) >ON VORTEX FORMATION IN THE WAKE FLOWS OF TRANSONIC TURBINE BLADES AND OSCILLATING AIRFOILS
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ON VORTEX FORMATION IN THE WAKE FLOWS OF TRANSONIC TURBINE BLADES AND OSCILLATING AIRFOILS

机译：透声涡轮叶片和振荡翼型尾流中的涡流形成

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摘要

This paper demonstrates similarities between the vortex shedding from blunt trailing-edged transonic turbine nozzle blades and from oscillating bluff bodies. Under subsonic conditions the turbine nozzle cascade shed wake vortices in a conventional von Karman vortex-street. This was linked with a depressed base pressure and associated energy separation in the wake. Under transonic conditions a variety of different shedding configurations was observed with vortices shedding and pairing in several different ways. Similarities are addressed between the observed structures and those from vortex shedding in some other physical situations. The authors have investigated the similarity between the vortex wakes shed from cylinders and airfoils in sinusoidal heaving motion in low speed flow and the wakes shed from the turbine nozzle cascade in transonic flow. The established field of vortex-induced vibration has provided a developed classification scheme for the phenomena observed. The paper has brought together three previously unrelated fields of investigation and, by showing that the three are essentially related, has provided the basis for a new synthesis.
机译：本文证明了钝尾的跨音速透平涡轮喷嘴叶片与振荡钝体的涡流脱落之间的相似性。在亚音速条件下，涡轮喷嘴在常规的von Karman涡街中流过尾流涡流。这与降低的基本压力以及尾流中相关的能量分离有关。在跨音速条件下，观察到各种不同的脱落构型，涡旋以几种不同方式脱落和配对。解决了观察到的结构与在其他一些物理情况下涡旋脱落引起的结构之间的相似性。作者研究了在低速流中以正弦起伏运动从圆柱体流下的涡流尾流与翼型之间的相似性，以及在跨音速流中从涡轮喷嘴级联流下的尾流之间的相似性。涡激振动的既定领域为观察到的现象提供了发达的分类方案。该论文汇集了三个以前不相关的研究领域，并且通过显示这三个领域本质上是相关的，为新的综述提供了基础。

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