Two-Zone Modeling Prediction Method of Centrifugal Compressor Performance

Abstract

In an effort to produce an effective performance prediction method of centrifugal compressor, based on the test data completed with current test facilities in turbocharger, theory of two-zone modeling performance prediction and its simulation method have been studied. The results demonstrate: 1) For two-zone modeling method, although the details of diffusion and loss processes have been actually considered, as well as the basic viscous flow processes under the influence of adverse pressure gradients, its simulation method is rather simply and practical, easier to apply in engineering design. 2) This method can effectively predict the performance of centrifugal compressor in turbocharger, including its surge boundary and choke boundary, and can effectively present its overall performance characteristics. 3) Cases provided in this article also indicate: comparing prediction value with test data, the difference of the total to total pressure ratio is less than 3%, the difference of adiabatic efficiency based on total to total pressure ratio is less than one point, and the mass flow difference on surge line or choke line is less than 0.06 at transonic operation conditions.