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.
ZHANG H T, LI X G, LIU X Z, et al.Enhancing fuel cell durability for fuel cell plug-in hybrid electric vehicles through strategic power management[J]. Applied energy, 2019, 241: 483-490.
LEWIS J, CLEMENTONI E, COX T, et al.Effect of compressor inlet temperature on cycle performance for a supercritical carbon dioxide brayton cycle[C]//The 6th International Supercritical CO
CLEMENTONI E M, COX T L.Effect of compressor inlet pressure on cycle performance for a supercritical carbon dioxide brayton cycle[C]//ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, 2018, Oslo, Norway, 2018.
TONG Z T, YANG X M, SHANG P X, et al.Effect of inlet condition on the performance curve of a 10 MW supercritical carbon dioxide centrifugal compressor[J]. Machines, 2022, 10(5): 359.