AERODYNAMIC PERFORMANCE STUDY OF TWO-STAGE CENTRIFUGAL AIR COMPRESSOR FOR FUEL CELLS UNDER TYPICAL WORKING CONDITIONS

Sun Xiuxiu; Zhang Zhongyuan; Wang Lin; Zhang Qian; Ma Teng; Meng Qi

doi:10.19912/j.0254-0096.tynxb.2024-1421

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 101-107. DOI: 10.19912/j.0254-0096.tynxb.2024-1421

AERODYNAMIC PERFORMANCE STUDY OF TWO-STAGE CENTRIFUGAL AIR COMPRESSOR FOR FUEL CELLS UNDER TYPICAL WORKING CONDITIONS

Sun Xiuxiu^1,2, Zhang Zhongyuan^1,2, Wang Lin³, Zhang Qian^1,2, Ma Teng^1,2, Meng Qi^1,2

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Abstract

The aerodynamic performance of a two-stage air compressor under variable altitude is severely degraded and cannot meet the dynamic demands of high-power-density fuel cells. In order to broaden the working limit of the two-stage air compressor, numerical simulation was used to study the aerodynamic performance under typical working conditions. The results show that： with the decrease of inlet pressure, the pressure ratio of the two-stage air compressor decreases by 32.73%, and the isentropic efficiency decreases by 34.60%; with the increase of inlet temperature, the pressure ratio of the two-stage air compressor increases by 23.27%, and the isentropic efficiency decreases by 12.76%; with the increase of rotational speed, the pressure ratio of the two-stage compressor increases by 145%, and the isentropic efficiency increases first and then decreases, reaching a maximum value of 66.83% near the design speed.

Key words

centrifugal compressors / fuel cells / impellers / numerical simulation / aerodynamic performance / variable altitude

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Sun Xiuxiu, Zhang Zhongyuan, Wang Lin, Zhang Qian, Ma Teng, Meng Qi. AERODYNAMIC PERFORMANCE STUDY OF TWO-STAGE CENTRIFUGAL AIR COMPRESSOR FOR FUEL CELLS UNDER TYPICAL WORKING CONDITIONS[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 101-107 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1421

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