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首页> 外文会议>American Society of Mechanical Engineers(ASME) Turbo Expo vol.5 pt.A; 20040614-17; Vienna(AT) >EXPERIMENTAL INVESTIGATION OF THE ROTOR-STATOR INTERACTIONS WITHIN A HIGH-SPEED, MULTI-STAGE, AXIAL COMPRESSOR PART 2 - MODAL ANALYSIS OF THE INTERACTIONS
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EXPERIMENTAL INVESTIGATION OF THE ROTOR-STATOR INTERACTIONS WITHIN A HIGH-SPEED, MULTI-STAGE, AXIAL COMPRESSOR PART 2 - MODAL ANALYSIS OF THE INTERACTIONS

机译：高速，多级轴流压缩机内转子-定子相互作用的实验研究-相互作用的模态分析

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摘要

The second part of this paper deals with the analysis of the 2D LDA measurements carried out within the high-speed multistage axial compressor CREATE. First the interactions correlations are quantified using the deterministic stresses introduced by Adamczyk. Secondly, a modal decomposition shows that the interactions are characterized by the presence of spatial harmonics (spinning lobes) given by a linear combination of the blades numbers. An original measurement of the rotating speed of the spinning lobes has been carried out allowing to identify almost all the spinning lobes in the first inter row region resulting from the R1-S1 interactions. For the first stage, where the influence of the downstream rows is low, the measured flow field is well reproduced by the model of Tyler and Sofrin. Spatial DFT of the flow field calculated for each time of the compressor time period show that there is a pulsation of the spatial harmonics with the period associated to the minimum elapsed time to recover the same relative positions of the rotor and stator rows.
机译：本文的第二部分讨论了在高速多级轴向压缩机CREATE中进行的二维LDA测量的分析。首先，使用Adamczyk引入的确定性应力来量化相互作用的相关性。其次，模态分解表明，相互作用的特征在于存在由叶片数量的线性组合给出的空间谐波（自旋波瓣）。已经进行了纺丝凸角的旋转速度的原始测量，从而可以识别出第一行间区域中由于R1-S1相互作用而产生的几乎所有纺丝凸角。对于第一阶段，下游排的影响较小，通过泰勒和索夫林模型可以很好地再现测得的流场。针对压缩机时间段的每个时间计算出的流场的空间DFT表明，空间谐波存在一个脉动，其周期与最小经过时间相关，以恢复转子和定子排的相同相对位置。

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