Improving screw compressor housing design using simulation

摘要

The sound radiation from a rotary screw compressor was simulated using structural finiteelement and acoustic boundary element analysis. The modes of the housing were measuredwith and without the screws. Finite element modal analysis results were compared to theexperimental modes with good agreement. Results demonstrated that the internalcomponents affected the bending modes but not the cylinder modes of the compressorhousing. The sound radiation from the compressor housing was then predicted usingacoustic boundary element analysis. The results indicated that the 2nd and 4th pumpingfrequencies were close to structural modes. Subsequent simulations investigated the effectof design changes on the housing via a thicker cylinder and the addition of ribs.