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Joint design of two‑stage boosting impeller exit blade angles based on PEMFC performance requirements
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Hanqian YANG1, Haipeng ZHOU1, 2, Suifeng CAO1, Lefeng ZHOU1, Guoqi YANG1, 2, Shaolin CHEN1, 2
Fluid Machinery | 2025, 53(4) : 53 - 60
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Fluid Machinery | 2025, 53(4): 53-60
Joint design of two‑stage boosting impeller exit blade angles based on PEMFC performance requirements
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Hanqian YANG1, Haipeng ZHOU1, 2, Suifeng CAO1, Lefeng ZHOU1, Guoqi YANG1, 2, Shaolin CHEN1, 2
Affiliations
  • 1College of Mechanical and Intelligent Manufacturing，Central South University of Forestry and Technology，Changsha 410004，China
  • 2Hunan Tyen Machinery co.，ltd，Hengyang 421000，China
Published: 2025-04-30 doi: 10.3969/j.issn.1005-0329.2025.04.008
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To address the issues of excessive mass flow at surge boundary in the high‑pressure stage and increased surge susceptibility in two‑stage centrifugal compressors，this study investigates the key structural parameter of impeller exit blade angle affecting surge characteristics. Based on CFD numerical simulations validated by the classical Krain impeller model，the influence of exit blade angles in low and high‑pressure stage impellers on overall compressor performance was analyzed. Results show that at the design speed of 70 000 r/min，smaller exit blade angles in both stages improve compressor efficiency at low flow conditions （0.02~0.07 kg/s） with slight pressure ratio reduction. Optimized smaller exit blade angles enhance efficiency by over 3% at low flow rates，reduce surge boundary mass flow by more than 25%，and significantly improve flow stability. The maximum static entropy increase in low and high‑pressure stages decreases by approximately 50% and 25%，respectively，reducing flow losses. This study provides design guidelines for developing two‑stage boosting systems for PEMFC applications.

fuel cell  /  two‑stage low specific speed centrifugal compressor  /  low‑flow high‑pressure ratio condition  /  two‑stage joint design
杨汉乾, 周海鹏, 曹岁丰, 周乐锋, 杨国旗, 陈少林. 基于PEMFC性能需求的两级增压叶轮出口安装角联合设计. 流体机械, 2025 , 53 (4) : 53 -60 . DOI: 10.3969/j.issn.1005-0329.2025.04.008
Hanqian YANG, Haipeng ZHOU, Suifeng CAO, Lefeng ZHOU, Guoqi YANG, Shaolin CHEN. Joint design of two‑stage boosting impeller exit blade angles based on PEMFC performance requirements[J]. Fluid Machinery, 2025 , 53 (4) : 53 -60 . DOI: 10.3969/j.issn.1005-0329.2025.04.008
Appendix
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Year 2025 volume 53 Issue 4
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Article Info
doi: 10.3969/j.issn.1005-0329.2025.04.008
  • Receive Date：2024-09-16
  • Online Date：2026-10-20
  • Published：2025-04-30
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History
  • Received：2024-09-16
  • Revised：2025-01-20
Affiliations
    1College of Mechanical and Intelligent Manufacturing，Central South University of Forestry and Technology，Changsha 410004，China
    2Hunan Tyen Machinery co.，ltd，Hengyang 421000，China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
genus		 种数
Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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