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Full Length Article | Open Access

Complicated flow in tip flow field of a compressor tandem cascade using delayed detached eddy simulation

Botao ZHANGa,b, Xiaochen MAOa,( ), Bo LIUa, Hejian WANGa, Zonghao YANGa
School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China
Taihang Laboratory, Chengdu 610000, China

Peer review under responsibility of Editorial Committee of CJA.

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Abstract

The complex flow characteristics in the tip region of a tandem cascade with tip clearance have been calculated and analyzed using Delayed Detached Eddy Simulation (DDES). The coherent mechanism of the vortex structures near the blade tip was discussed, and the unsteady behaviors and features in the tip flow field were analyzed. Additionally, the interaction between the tip leakage flow and the gap jet was revealed. The results show that, compared to the datum cascade, the blade tip load of the rear blade increases while that of the front blade decreases. Unsteady fluctuations of the tandem cascade are mainly caused by the interaction between the tip leakage flow and gap jet, and by the mixing of the vortex structures, but there is no essential change in the spectrum feature of the tip leakage flow. Finally, a detailed analysis of the development of vortices in the tip region is conducted by the topological structures of the flow field. Combined with the three-dimensional vortex structures, the schematic diagram of the vortex system of the datum single-row cascade and tandem cascade is summarized.

Keywords

Unsteady flowTip leakage flowTandem cascadeDelayed Detached Eddy Simulation (DDES)Gap jetTopological structure

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Chinese Journal of Aeronautics
Volume 37 Issue 8,
August 2024
Pages 63-78
DOI: 10.1016/j.cja.2024.03.044
Cite this article:
ZHANG B, MAO X, LIU B, et al. Complicated flow in tip flow field of a compressor tandem cascade using delayed detached eddy simulation. Chinese Journal of Aeronautics, 2024, 37(8): 63-78. https://doi.org/10.1016/j.cja.2024.03.044

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Received: 15 June 2023
Revised: 13 August 2023
Accepted: 21 September 2023
Published: 01 April 2024
© 2024 Chinese Society of Aeronautics and Astronautics.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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