Simulation of Variable Working Conditions and&nbsp;Analysis of Axial Force Change Mechanism for Centrifugal Compressor

LI Xiaojie; WANG Yaming; DONG Xiaorui; WANG Jun; MEN Rixiu; HAN Shaojian

Vehicle Engine ›› 2024, Vol. 0 ›› Issue (4) : 38-45.

Simulation of Variable Working Conditions and Analysis of Axial Force Change Mechanism for Centrifugal Compressor

LI Xiaojie¹，WANG Yaming¹，DONG Xiaorui¹，WANG Jun¹，MEN Rixiu²，HAN Shaojian¹

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Abstract

The change of axial force for supercharger during the switching of successive supercharging systems will seriously affect its stability. Taking the compressor end of Garrett TBP4 supercharger as the research object, the full-flow path calculation domain of compressor was established and the polyhedral mesh was divided, seven working conditions were designed, and the effects of the switching time, the switching speed and the switching outlet pressure change during the switching process on the axial force of compressor were researched with CFD software. Meanwhile, the axial force change mechanism was analyzed based on the internal flow field. The results show that the switching time mainly affects the moment of sudden increase of axial force, the switching speed amplitude mainly affects the final axial force, and the switching outlet pressure amplitude mainly affects whether the axial force suddenly increases. The blade axial force is affected the most by the flow field.

Key words

sequential supercharging system / centrifugal compressor / axial force

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LI Xiaojie，WANG Yaming，DONG Xiaorui，WANG Jun，MEN Rixiu，HAN Shaojian. Simulation of Variable Working Conditions and Analysis of Axial Force Change Mechanism for Centrifugal Compressor[J]. Vehicle Engine. 2024, 0(4): 38-45