Influence of Blade Trailing Edge Width on Performance
of Centrifugal Compressor

Vehicle Engine ›› 2026, Vol. 0 ›› Issue (1) : 25-33.

Influence of Blade Trailing Edge Width on Performance of Centrifugal Compressor

LYU Baicang¹，LI Song¹，FENG Jianzeng²，DING Kaifang¹，WANG Yongqing³

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Abstract

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.

Key words

centrifugal compressor / numerical simulation / blade trailing edge width / compressor performance

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LYU Baicang, LI Song, FENG Jianzeng, DING Kaifang, WANG Yongqing. Influence of Blade Trailing Edge Width on Performance of Centrifugal Compressor[J]. Vehicle Engine. 2026, 0(1): 25-33