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Wednesday, July 10 • 17:10 - 17:30
NUMERICAL ANALYSIS OF EFFECTS OF TIP CLEARANCE ON COMPRESSOR PERFORMANCE AND NOISE CHARACTERISTICS

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The effects of tip clearance on compressor performance and noise emission are numerical analyzed in this paper. The compressor steady flow characteristics with different tip clearances are calculated under three different operating speeds, the compressor unsteady flow simulations are subsequently completed to obtain the noise sources, then the compressor noise is calculated through acoustic boundary element method (BEM). The results indicate that the total-to-total pressure ratio and efficiency of the compressor decrease with the tip clearance in-creasing, the trend is more obvious in high compressor rotating speeds. However, the compressor performance improves when the tip clearance increases in a small range 0-0.15mm. The analysis of compressor noise spectrum shows that the tip clearance has little influence on compressor tonal noise but there is a great influence on compressor broadband noise. The compressor noise has obvious acoustic directivity in the area of compressor inlet in all calculation cases, but the sound pressure level varies with the tip clearance changing.

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avatar for Naval Agarwal

Naval Agarwal

Technical Fellow, The Boeing Company

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Wednesday July 10, 2019 17:10 - 17:30 EDT
Outremont 4
  T06 Industr. and occup. Noise & vib., SS03 Ns & vibr in sm med & lrg ind

Attendees (5)