Research on the impact of rain ingestion considering s-shaped inlet distortion on the performance of a centrifugal compressor
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He Wang
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Xiangyang Liu
Abstract
To study the combined effects of engine rain ingestion and outlet distortion of the S-duct inlet on the performance of a centrifugal compressor, this research conducted numerical simulations with the M2129 inlet and a specific centrifugal compressor as the research objects. At the same operating point, under the inlet-compressor coupled simulation condition, the downstream guide cone of the compressor exerts a stagnation effect on the outlet cross-section of the inlet, resulting in a decrease in the Mach number in the central region. Under the rain ingestion state in the coupled simulation, water droplets undergo two stages of breakup along the flow path; meanwhile, the special structure of the S-duct inlet leads to their accumulation at the compressor inlet. Both inlet distortion and rain ingestion cause a decline in the compressor’s performance parameters.
Acknowledgments
The authors would like to thank Prof. Fengming Wang, Teacher Yibing Xu, and Classmate Xiangyang Liu from Nanjing University of Aeronautics and Astronautics (NUAA) for their support and assistance in this study. Additionally, the authors appreciate the access to the high-performance computing platform provided by NUAA.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The author states no conflict of interest.
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Research funding: None declared.
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Data availability: The core simulation results are presented in the figures and tables of this manuscript. Due to confidentiality requirements of the research project, the original input parameter files and full-scale geometric models cannot be publicly shared. However, the key simulation settings (e.g., turbulence model selection, mesh generation parameters) necessary for reproducing the main findings are detailed in the “Methodology” section of this paper; researchers may contact the authors for further clarification on non-confidential technical details.
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