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首页> 外文会议>ASME turbo expo >BLADE ROW INTERACTION IN A ONE AND A HALF STAGE TRANSONIC TURBINE FOCUSING ON THREE DIMENSIONAL EFFECTS-PART I: STATOR-ROTOR INTERACTION
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BLADE ROW INTERACTION IN A ONE AND A HALF STAGE TRANSONIC TURBINE FOCUSING ON THREE DIMENSIONAL EFFECTS-PART I: STATOR-ROTOR INTERACTION

机译：叶片行相互作用在一个半阶段的跨音涡轮机上聚焦在三维效应上 - 第一部分：定子 - 转子相互作用

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摘要

The unsteady and fully three-dimensional aerodynamics of HP turbines represent a relevant research branch for future aero-engine design. When stator-rotor interaction mechanisms and clocking effects are of concern, advanced measurement techniques as well as unsteady CFD codes are required. An extensive study on this topic was carried out in a one and a half stage transonic turbine operating at Graz University of Technology. Two steady and unsteady measurement techniques (Laser Doppler Velocimetry and a Fast Response Aerodynamic Pressure Probe) and an unsteady 3D CFD code were applied to the problem. In this paper, the 1st vane - rotor interaction is presented and discussed in detail to provide the basis for the analysis of the rotor - 2nd vane and the vane-vane interactions. The rotor-exit flowfield is mainly characterized by the wake, the hub passage vortex, the tip leakage vortex and the trailing edge shocks. All the flow structures except the tip leakage flow are strongly influenced by the first vane; in particular the main source of blade row interaction is the first vane trailing edge shock, that periodically alters the rotor trailing edge shock and the rotor hub passage vortex. The comparison with the CFD assesses the interpretation of the flow physics, and supports the identification of the first stator effects at the second stator inlet. A discussion on the stage performance is also provided.
机译：HP涡轮机的不稳定和全三维空气动力学代表未来航空发动机设计的相关研究分支。当定子转子相互作用机制和时钟效果是关注的，需要先进的测量技术以及不稳定的CFD代码。对这一主题进行了广泛的研究，是在格拉茨理工大学运营的一个半阶段的跨音涡轮机中进行。两个稳态和不稳定的测量技术（激光多普勒测速器和快速响应空气动力学压力探测器）和不稳定的3D CFD代码应用于问题。在本文中，详细介绍和讨论了第一叶片 - 转子相互作用，以提供转子 - 第二叶片和叶片叶片相互作用的分析的基础。转子出口流场主要是唤醒，轮毂通道涡流，尖端泄漏涡流和后缘冲击。除尖端泄漏流外的所有流动结构都受到第一叶片的强烈影响;特别地，叶片行相互作用的主源是第一叶片后缘冲击，其周期性地改变转子后缘冲击和转子轮毂通道涡旋。与CFD的比较评估流量物理学的解释，并支持在第二定子入口处的第一定子效应的识别。还提供了关于舞台表现的讨论。

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