TY - Jour A2 - Bois，Gerard Au - Fujisawa，Nobumichi Au - Ohta，Yutaka Py - 2017 Da - 2017/05/31 TI - 过渡过程从扩散器摊位到一名离心式压缩机中的段落摊位，带有叶片漫射器SP - 2861257 VL- 通过实验性和数值分析研究了从扩散器旋转转速到离心式压缩机中的舞台停顿的过渡过程。通过实验和数值分析研究了带叶片扩散器的阶段失速。从速度测量开始，发现旋转失速在漫射器通道的散介侧存在于偏移设计流动状态。数值结果揭示了扩散器失速的典型涡流结构。The diffuser stall cell was caused by the systematic vortical structure which consisted of the tornado-type vortex, the longitudinal vortex at the shroud/suction surface corner (i.e., leading edge vortex (LEV)), and the vortex in the throat area of the diffuser passages. Furthermore, the stage stall, which rotated within both the impeller and diffuser passages, occurred instead of the diffuser stall as the mass flow rate was decreased. According to the velocity measurements at the diffuser inlet, the diffuser stall which rotated on the shroud side was shifted to the hub side. Then, the diffuser stall moved into the impeller passages and formed the stage stall. Therefore, the stage stall was caused by the development of the diffuser stall, which transferred from the shroud side to the hub side in the vaneless space and expanded to the impeller passages. SN - 1023-621X UR - https://doi.org/10.1155/2017/2861257 DO - 10.1155/2017/2861257 JF - International Journal of Rotating Machinery PB - Hindawi KW - ER -