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Assimilation of EFD and CFD in Analysis of Complex Internal Flow

EFD与CFD在复杂内流分析中的同化

基本信息

批准号：
15360097
负责人：
FURUKAWA Masato
金额：
$ 7.68万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360097/
关键词：
Complex Flow Internal Flow EFD CFD CFD Hybrid Analysis

项目摘要

An analysis method for complex internal flow fields has been developed by combining experimental fluid dynamics (EFD) and computational fluid dynamics (CFD). This EFD/CFD hybrid analysis was applied to unsteady three-dimensional separated and vortical flow phenomena in transonic and low-speed axial flow compressor rotors.At near-stall operating condition in a transonic axial flow compressor rotor, the spiral-type breakdown of the tip leakage vortex is caused by the interaction between the vortex and the shock wave. The vortex breakdown has the nature of self-sustained flow oscillation and gives rise to the large fluctuation of the tip leakage flow field, in terms of shock wave location, blockage near the rotor tip and three-dimensional separation structure on the suction surface. It was found that the breakdown of the tip leakage vortex leads to the unsteady flow phenomena near the rotor tip, accompanying large blockage effect in the transonic compressor rotor at the near-stall condition.A transient flow phenomenon of rotating stall inception in an axial flow compressor rotor has been investigated by the EFD/CFD hybrid analysis. Instantaneous distributions of the casing wall pressure were obtained experimentally by ‘Synchronous Field Measurement' using time interpolation. Unsteady three-dimensional separated and vortical flow structure was captured by unsteady Navier-Stokes flow simulation. To elucidate the unsteady flow phenomenon at the stall inception, vortex structures and separation topology were identified by the critical point theory. It was found that the spiral-type breakdown of the tip leakage vortex occurred at near-stall condition, and the cause of rotating stall was the leading edge separation on the rotor. Furthermore, the stall cell was found to consist of a tornado-type separation vortex linking from blade suction surface to the casing at rotating stall inception.

将实验流体动力学（EFD）和计算流体动力学（CFD）相结合，发展了一种复杂内部流场的分析方法。采用EFD/CFD混合分析方法，对跨声速低速轴流压气机转子内的三维非定常分离流和旋涡流现象进行了研究，结果表明：在跨声速轴流压气机转子近失速工况下，泄漏涡与激波相互作用，导致泄漏涡螺旋型破裂。涡破裂具有自持流动振荡的性质，导致叶尖泄漏流场在激波位置、叶尖附近堵塞和吸力面三维分离结构等方面产生较大的波动。采用EFD/CFD混合分析方法，研究了跨声速压气机转子在近失速状态下的旋转失速起始瞬态流动现象。采用时间插值的同步场测量方法，对套管壁面压力的瞬时分布进行了实验研究。通过非定常N-S流场模拟，得到了非定常三维分离涡结构。为了解释失速起始时的非定常流动现象，用临界点理论识别了涡结构和分离拓扑。结果表明，在近失速状态下，叶尖泄漏涡发生螺旋型破裂，转子前缘分离是导致旋转失速的原因。此外，失速单元被发现是由一个龙卷风型分离涡连接从叶片吸力面到机匣在旋转失速开始。

项目成果

期刊论文数量（15）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

ターボ機械における流動現象の知的可視化

涡轮机械中流动现象的智能可视化

DOI：
发表时间：
2003
期刊：
可視化情報学会誌 23-91
影响因子：
0
作者：
Kazutoyo YAMADA et al.;Kazutoyo YAMADA et al.;Kazutoyo YAMADA et al.;Ken-ichiro IWAKIRI et al.;Ken-ichiro IWAKIRI et al.;Ken-ichiro IWAKIRI et al.;Kazutoyo YAMADA et al.;Masahiro INOUE et al.;K.YAMADA et al.;M.INOUE et al.;Masahiro INOUE;古川雅人
通讯作者：
古川雅人

Vortical Flow Field in an Axial Flow Compressor Rotor at Rotating Stall Inception

轴流压气机转子旋转失速起始时的涡流场

DOI：
发表时间：
2005
期刊：
Proceedings of the 3rd International Conference on Vortex Flows and Vortex Models
影响因子：
0
作者：
Kazutoyo YAMADA et al.;Kazutoyo YAMADA et al.;Kazutoyo YAMADA et al.;Ken-ichiro IWAKIRI et al.;Ken-ichiro IWAKIRI et al.
通讯作者：
Ken-ichiro IWAKIRI et al.

Vortical Flow Field in an Acial Flow Compressor Rotor at Rotating Stall Inception

旋转失速初始时的 Acial 流压缩机转子中的涡流场

DOI：
发表时间：
2005
期刊：
Proceedings of the 3rd International Conference on Vortex Flows and Vortex Models
影响因子：
0
作者：
Kazutoyo YAMADA et al.;Kazutoyo YAMADA et al.;Kazutoyo YAMADA et al.;Ken-ichiro IWAKIRI et al.
通讯作者：
Ken-ichiro IWAKIRI et al.

Sung-Hyup KIM: "Behavior of Tip Vortex in a Propeller Fan Rotor"Proceedings of the 7th Asian International Conference on Fluid Machinery. 30025 (2003)

Sung-Hyup KIM：“螺旋桨风扇转子中尖端涡流的行为”第七届亚洲国际流体机械会议论文集。