Modeling of small-size turbocharger compressors' performance curves

Non-adiabatic performance curves of a small-size turbocharger compressor, which was tested at the Institute of Turbo machines (Hanover, Germany) in a range of periphery Mach numbers 0,73 - 1,44, were modeled using software developed at the Compressor Dept. TU Saint-Petersburg (Russia). The computer models and software, recently updated (the new 6th generation), were applied to small-size high Mach number compressors, along with this several improvements of basic algorithms and iterative processes in thermodynamic calculations were made. The head loss model demonstrated its validity after empirical coefficients' correlation according to new test data. The practical result of the work is that corrected algorithms and software could be used to model performances curves of small-size turbocharger compressors designed for periphery Mach numbers up to 1,44 rather satisfactorily in a wide range of RPM.