Optimization of cooling channel structure of air-cooled oil-cooled oil-free scroll compressor based on RBF

Abstract

Abstract: In order to improve the uniformity of air supply in the cooling channel of the air-cooled oil-free scroll compressor, reduce the energy loss, and improve the heat dissipation effect of the dynamic and static scroll disk, the structure of the cooling channel is optimized through numerical simulation and multi-objective optimization. The cooling channel section, transition form, and the shape and number of deflectors are used as the research objects for numerical simulation. The radial basis neural network is used to construct an approximate model, and the NSGA-Ⅱ algorithm is used to carry out multi-objective optimization to select structural parameters, and then the final model of the cooling channel is determined. The relationship between inlet velocity and flow field was studied. The results show that, after optimization, the relative standard deviation of outlet velocity was reduced by 30.73%, the relative standard deviation of center section velocity was reduced by 50.17%, and the inlet and outlet pressure drop was reduced by 87.16%, which significantly improved the uniformity of air supply and reduced energy loss. While the flow field uniformity was relatively insensitive to variations in inlet velocity, the pressure drop exhibited sharp changes.

Key words: scroll compressor, cooling channel, flow field analysis, multi-objective optimization

CLC Number:

TH45

PENG Bin, DOU Wang-hong, NIU Ke. Optimization of cooling channel structure of air-cooled oil-cooled oil-free scroll compressor based on RBF[J]. Journal of Lanzhou University of Technology, 2025, 51(3): 32-40.

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