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Convective heat transfer in a scroll compressor chamber: a 2-D simulation.

Author(s) : OOI K. T., ZHU J.

Type of article: Article

Summary

The literature shows that there is no comprehensive study available on convective heat transfer in a scroll compressor. In the paper, a two-dimensional model has been developed to study the fluid flow and heat transfer in the working chamber of the scroll compressor. The unsteady continuity, momentum and energy equations for the gas flow in the scroll chamber were formulated. The curvilinear, moving and deforming scroll chamber was modelled employing the body-fitted coordinate grid by applying a "two-boundary" algebraic method. The computation accounted for the effect of simultaneous change in the instantaneous volume (volumetric size) and the moving boundary (geometrical shape) of the scroll chamber. With the aid of an available CFD code, the convective heat transfer has been calculated using a standard k-turbulence model with a log-law wall function. Results show that available empirical correlations with lumped parameter approach are inadequate in predicting heat transfer within the scroll compressor chamber. This is due to higher heat transfer as a result of the re-circulating flow, in particular, during the later period of the compression process. Results showed that gas properties in the chamber, except the pressure, are highly spatially distributed.

Details

  • Original title: Convective heat transfer in a scroll compressor chamber: a 2-D simulation.
  • Record ID : 2004-2784
  • Languages: English
  • Source: International Journal of thermal Sciences - vol. 43 - n. 7
  • Publication date: 2004/07

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