Coexisting State of Surge and Rotating Stall in a Two-Stage Axial Flow Compressor using a Double-Phase-Locked Averaging Technique
Coexisting State of Surge and Rotating Stall in a Two-Stage Axial Flow Compressor using a Double-Phase-Locked Averaging Technique
复制标题
采用双锁相平均技术的两级轴流压缩机喘振和旋转失速共存状态
DOI：
10.1007/s11630-017-0907-x
复制
发表时间：
2017
影响因子：
2.5
通讯作者：
Yutaka OHTA
中科院分区：
文献类型：
--
作者：
Yuu SAKATA;Yutaka OHTA
从非定常内部流动结构的角度研究了轴流压气机喘振与旋转失速的相互作用。本研究的目的是确定的关键因素，决定切换现象的浪涌周期。被测压气机的主要特点是激波管通过膜片、狭缝和同心双管串联到压气机出口：该系统允许通过将激波管与压气机连接来产生喘振和旋转失速，或者使压缩平面波注入。详细测量了喘振共存状态下的非定常特性和内部流速脉动，并对喘振共存状态下失速胞结构沿工作点移动方向进行了沿着平均和可视化。利用平均结果计算了单元尺度波动系数，证实了在下一个喘振周期内，内部流场结构的变化过程各不相同。结果表明，在失速和失速恢复过程中，决定下一个循环的关键因素是内部流动结构的变化，特别是失速单元和整个周向失速之间的变化。
The interaction between surge and rotating stall in an axial flow compressor was investigated from the viewpoint of an unsteady inner flow structure. The aim of this study was to identify the key factor that determines the switching phenomenon of a surge cycle. The main feature of the tested compressor is a shock tube connected in series to the compressor outlet through a diaphragm, slits, and a concentric duplex pipe: this system allows surge and rotating stall to be generated by connecting the shock tube with the compressor, or enables the compression plane wave injection. The unsteady characteristics and the internal flow velocity fluctuations were measured in detail, and the stall cell structure was averaged and visualized along the movement of the operation point under a coexisting state of surge. A coefficient of the cell scale fluctuation was calculated using the result of the averaging, and it confirmed that the processes of inner flow structure change differed from each other according to the next cycle of the surge. The result suggests that the key factor that determines the next cycle is the transformation of the internal flow structure, particularly between the stall cell and the entire circumferential stall, in both the recovering and stalling processes.