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Three-dimensional Navier-Stokes simulations of the workings of scroll compressors.

Number: pap. 1235

Author(s) : PICAVET A., GENEVOIS D.

Summary

This paper presents a detailed study of the scroll compressor compression process. Three-dimensional Navier-Stokes simulations are performed from the intake of the scroll wraps to the exit of the compressor, using moving meshes and a real gas equation for R410A. A new meshing technique has been used, which generates high quality structured grids for the scroll set, and gives a significant reduction on CPU time whilst maintaining accuracy. Various operating points and rotational speeds are computed and the results are compared with detailed pressure measurements. Comparisons between computed and measured data show very good agreement, for the compressor nominal operating point as well as for higher and lower pressure ratios. The over or under-compression, which is typical of these operating conditions, is well represented. The total computed flow rates are also very close to the measured data, and for every simulated operating point. These results show that the flow leakage occurring during the compression process is correctly modelled, which is a very important point for performance prediction. Overall, this study shows that significant progress has been made for the modelling of compression processes in positive displacement machines.

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Pages: 8

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Details

  • Original title: Three-dimensional Navier-Stokes simulations of the workings of scroll compressors.
  • Record ID : 30024258
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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