Novel structural design of mixed-flow compressor with high structural efficiency

Structural efficiency evaluation method was employed and improved in structural design of high-load mixed-flow compressor to meet the strict requirements and to optimize the bladed disk structure. Two novel structure schemes were put forward named type "C" and type "M" to increase the structural efficiency. The key items including average stress, vibration robust coefficient and rim deformation coordination coefficient were calculated, and structural efficiency coefficient was studied and evaluated contrastively. Finally, the advantages of the novel structure schemes are proved including low weight, high reliability and low loss at blade tips. The calculation result shows the "M" structure scheme could result in that 24.7% increase in average stress, 20% decreasing in mass, 37.9% decreasing in vibration response and 67.6% decreasing in rim deformation.