Three-Dimensional Separation in Complex Internal Flow Fields

复杂内部流场的三维分离

• 批准号: 10305017
• 负责人: INOUE Masahiro
• 金额: $ 23.42万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10305017/
• 关键词: Complex Flow; Internal Flow; Three-Dimensional Separation; Centrifugal Force; Coriolis Force; Turbomachinery; Rotating Stall; コリオリカ; 限界流線; 限界渦線; 特異点

Evolution and structure of rotating stall cells in an axial compressor rotor have been investigated. To capture the flow field phase-locked to both of the rotor and the stall cell, a double phase-locked averaging technique has been developed. Time-dependent ensemble averages of three-dimensional velocity components upstream and downstream of the rotor have been obtained with a slanted hot-wire, and pressure distributions on the casing wall with high response pressure transducers.The short length-scale stall cell is characterized by a concentrated vortex spanning from the casing wall ahead of the rotor to the blade suction surface. In the long length-scale stall cell, the separation vortices go upstream irregularly when blade separation develops in the front half of the cell, and reenter the rotor on the hub side in the rear half of it. Behavior of casing wall pressure disturbances corresponding to the short and long length-scale stall cells is different depending on the stator-rotor gap. For the large and middle gap, the stall inception is detected by a spiky short length-scale disturbance, and the number of spiky waves increases to generate the high frequency waves. They becomes the short length-scale part-span stall cells at the mild stall for the large gap, while they turn into a big stall cell with growth or a long length-scale disturbance for the middle gap. In the latter case, therefore, the stalling process was identified with 'high frequency stall inception'. For the small stator-rotor gap, the stalling process is identified with 'long wave-length stall inception', and supported the recent computational model for the short wave-length stall inception by showing that closing the rotor-stator gaps suppressed the growth of short length-scale disturbances. It is found that the short length-scale disturbance results from a separation vortex from a blade surface to reduce circulation.

研究了轴流压气机转子内旋转失速胞的演化和结构。为了捕获与转子和失速单元锁相的流场，发展了双锁相平均技术。用倾斜热线法获得了转子上下游三维速度分量随时间变化的系综平均值，用高响应压力传感器获得了机匣壁面压力分布，短尺度失速单元的特征是从转子前的机匣壁面到叶片吸力面之间存在一个集中涡。在长尺度失速单元中，前半部分叶片分离时，分离涡不规则地向上游移动，后半部分从轮毂侧重新进入转子，短尺度失速单元和长尺度失速单元对应的机匣壁压扰动行为随定转子间隙的不同而不同。对于大间隙和中间隙，失速起始由尖峰短尺度扰动检测，尖峰波的数量增加，产生高频波。大间隙时，它们在轻度失速时形成短尺度的部分跨失速胞元，而中间隙时，它们形成大尺度的增长失速胞元或长尺度扰动失速胞元。因此，在后一种情况下，失速过程被识别为“高频失速起始”。对于较小的定转子间隙，失速过程被识别为“长波失速起始”，并通过表明关闭定转子间隙抑制了短长度的增长来支持最近的短波失速起始计算模型。尺度扰动。研究发现，短尺度扰动是由叶片表面的分离涡减少环量引起的。

项目成果

Masahiro INOUE et al.: "Development od Multiple Cells with Short Length-Scale Stall in an Axial Compressor Rotor"Transactions of JSME, Series B. Vol.65, No. 640. 4021-4026 (1999)

Masahiro INOUE 等人：“轴向压缩机转子中具有短长度尺度失速的多个单元的开发”JSME 交易，系列 B.第 65 卷，第 640 期。4021-4026 (1999)

井上雅弘: "軸流圧縮機における小スケール多重旋回失速セルの伝播のメカニズム"日本機械学会論文集,B編. 66-643. 804-809 (2000)

Masahiro Inoue：“轴流式压缩机中小型多旋转失速单元的传播机制”，日本机械工程师学会会刊，B 版 66-643（2000 年）。

Masahiro INOUE et al.: "Visualization of Multiple Stall Cells propagating in an Axial Compressor Rotor"Proceedings of the 3rd ASME/JSME Joint Fluids Engineering Conference. (1999)

Masahiro INOUE 等人：“轴向压缩机转子中传播的多个失速单元的可视化”第三届 ASME/JSME 联合流体工程会议论文集。

Masahiro INOUE et al.: "Propagation of Multiple Short Length-Scale Stall Cells in an AxialCompressor Rotor"Transactions of ASME, Journal of Turbomachinery. 122-1. 45-54 (2000)

Masahiro INOUE 等人：“轴向压缩机转子中多个短长度尺度失速单元的传播”ASME 汇刊，涡轮机械杂志。

Masahiro INOUE: "Measurements of Rotating Stall Cells in an Axial Compressor Rotor by Means of Double Phase-Locked Averaging Technique"Proc.of the 7th Asian Intern.Conf.on Fluid Machinery. 97-106 (2000)

Masahiro INOUE：“通过双锁相平均技术测量轴流式压缩机转子中的旋转失速单元”第七届亚洲流体机械国际会议论文集。