The multi-scheme design and optimization
of blade trailing edge width for centrifugal compressor was carried out by
numerical simulation method. The influencing law of blade trailing edge width
on compressor performance and the internal flow characteristics of impeller are
analyzed in detail, and the results before and after optimization were
compared. The results show that the trailing edge blade width has different
effects on the compressor performance at different compressor speeds. Under the
design condition, the modified trailing edge blade width can increase the
pressure ratio by 2.19% and the efficiency by 0.59%, the performance gap between the two width blades changes with the
change of speed. The optimized trailing edge width can also increase the flow
in the blocking area of each speed, broadening the range of compressor working
flow. After optimization, the maximum pressure ratios increase by 1.5%-3.21% and the maximum efficiency increases by 0.75%-1.75% with a more pronounced performance improvement in the medium
and high speed region.
