鱼鳞纹叶栅试验研究
EXPERIMENTAL INVESTIGATION OF FISH SCALE PATTERNED CASCADE
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Abstract: Several cascades with different patterns have been tested with the purpose of turbulence drag reduction in compressor cascade,after the straight patterned cascade obtained notable effects.The fish scale patterned cascade is the best of them.The main performance comparison is shown as follows: CascadeMa1cr△βdesignδdesign(P2/P1)2Dmaxξi=05°/%△ireference straight pattern fish scale pattern0685 0735 0750408° 417° 411°67° 58° 64°11810 11987 1212757609 34261 30610100° 104° 104° The above test data indicate that most of performance indices of the fish scale patterned cascade,such as critical Mach number Ma1cr,maximum two-dimensional static compression ratio (P2/P1)2Dmax and total pressure loss coefficient at maximum attack angle ξi=05° are improved over the straight patterned cascade.The other performance parameters,namely attack angle range △i,flow deflection angle at design point △βdesign and corresponding deviation angle at design point δdesign,are superior to the reference cascade as well.It is particularly worth to point out that the fish scale pattern and the straight pattern can be together applied to the same blade to obtain advantageous performance.
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Key words:
- Compressors cascades /
- Drag reduction /
- Experiment /
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