Vortical flow structure of hub-corner separation in a stator cascade of a multi-stage transonic axial compressor

Seishiro Saito, Masato Furukawa, Kazutoyo Yamada, Yuki Tamura, Akinori Matsuoka, Naoyuki Niwa

研究成果: 著書/レポートタイプへの貢献会議での発言

1 引用 (Scopus)

抄録

In this study, the hub-corner separation in a multi-stage transonic axial compressor has been investigated using a largescale detached eddy simulation (DES) with about 4.5 hundred million computational cells. The complicated flow field near the hub wall in a stator with partial tip clearances was analyzed by data mining techniques extracting important flow phenomena from the DES results. The data mining techniques applied in the present study include vortex identification based on the critical point theory and topological data analysis of the limiting streamline pattern visualized by the line integral convolution (LIC) method. It is found from the time-averaged flow field in the first stator that the hub-corner separation vortex formed near the solid part of the stator tip interacts with the leakage flow and secondary flow on the hub wall, resulting in a complicated vortical flow field. Near the leading edge of the stator, the leakage flow from the front partial clearance generates the tip leakage vortex, which produces loss from the leading edge to 10 percent chord position. At the mid-chord, the hub-corner separation vortex suffers a breakdown, resulting in the widespread huge loss production. It is shown from limiting streamlines on the suction surface of the stator that a reverse flow region expands radially from the solid part of the stator tip toward the downstream. From 50 percent chord position to the trailing edge of the stator, the leakage flow through the rear partial clearance interacts with the secondary flow on the hub wall. The leakage vortex generated along the rear partial clearance becomes a major loss factor there.

元の言語英語
ホスト出版物のタイトルSymposia
ホスト出版物のサブタイトルKeynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery
出版者American Society of Mechanical Engineers (ASME)
1A-2017
ISBN(電子版)9780791858042
DOI
出版物ステータス出版済み - 2017
イベントASME 2017 Fluids Engineering Division Summer Meeting, FEDSM 2017 - Waikoloa, 米国
継続期間: 7 30 20178 3 2017

その他

その他ASME 2017 Fluids Engineering Division Summer Meeting, FEDSM 2017
米国
Waikoloa
期間7/30/178/3/17

Fingerprint

Flow structure
Stators
Compressors
Vortex flow
Flow fields
Secondary flow
Data mining
Convolution

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

これを引用

Saito, S., Furukawa, M., Yamada, K., Tamura, Y., Matsuoka, A., & Niwa, N. (2017). Vortical flow structure of hub-corner separation in a stator cascade of a multi-stage transonic axial compressor. : Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery (巻 1A-2017). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/FEDSM2017-69116

Vortical flow structure of hub-corner separation in a stator cascade of a multi-stage transonic axial compressor. / Saito, Seishiro; Furukawa, Masato; Yamada, Kazutoyo; Tamura, Yuki; Matsuoka, Akinori; Niwa, Naoyuki.

Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery. 巻 1A-2017 American Society of Mechanical Engineers (ASME), 2017.

研究成果: 著書/レポートタイプへの貢献会議での発言

Saito, S, Furukawa, M, Yamada, K, Tamura, Y, Matsuoka, A & Niwa, N 2017, Vortical flow structure of hub-corner separation in a stator cascade of a multi-stage transonic axial compressor. : Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery. 巻. 1A-2017, American Society of Mechanical Engineers (ASME), ASME 2017 Fluids Engineering Division Summer Meeting, FEDSM 2017, Waikoloa, 米国, 7/30/17. https://doi.org/10.1115/FEDSM2017-69116
Saito S, Furukawa M, Yamada K, Tamura Y, Matsuoka A, Niwa N. Vortical flow structure of hub-corner separation in a stator cascade of a multi-stage transonic axial compressor. : Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery. 巻 1A-2017. American Society of Mechanical Engineers (ASME). 2017 https://doi.org/10.1115/FEDSM2017-69116
Saito, Seishiro ; Furukawa, Masato ; Yamada, Kazutoyo ; Tamura, Yuki ; Matsuoka, Akinori ; Niwa, Naoyuki. / Vortical flow structure of hub-corner separation in a stator cascade of a multi-stage transonic axial compressor. Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery. 巻 1A-2017 American Society of Mechanical Engineers (ASME), 2017.
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