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

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

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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 coher-ent 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 vor-tex structures,the schematic diagram of the vortex system of the datum single-row cascade and tan-dem cascade is summarized.

Tandem cascadeTip leakage flowDelayed Detached Eddy Simulation(DDES)Unsteady flowGap jetTopological structure

Botao ZHANG、Xiaochen MAO、Bo LIU、Hejian WANG、Zonghao YANG

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School of Power and Energy,Northwestern Polytechnical University,Xi'an 710129,China

Taihang Laboratory,Chengdu 610000,China

National Science and Technology Major Project,ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities,ChinaFoundation of State Level Key Laboratory of Airfoil and Cascade Aerodynamics,ChinaFoundation of State Level Key Laboratory of Airfoil and Cascade Aerodynamics,ChinaInnovation Foundation for Doctor Dissertation of Northwestern Polytechnical University,China

2017-Ⅱ-0001-00135210605751790512D5000210483D5150210006D5050210015CX2022013

2024

10.1016/j.cja.2024.03.044

中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
年,卷(期)：2024.37(8)
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