Technical Paper
Uncertainty and Measurement Sensitivity of Turbocharger Compressor Gas Stands
2013-04-08
2013-01-0925
Turbocharger performance is described in terms of compressor and turbine characteristics or operating maps. Reliable definition of the compressor map requires the accurate determination of the mass flow range, the boost pressure capability, and the efficiency of the compressor. Even though computational fluid dynamics provides significant information for the design of a given compressor, field testing is required to validate the actual compressor performance that will be delivered to the end-user. Hence, the precision and accuracy of the experimental facility are of vital importance, both regarding turbocharger development and customer needs. In this paper, uncertainty analysis is carried out to evaluate the propagation of measurement errors into the calculation of compressor performance characteristics. Uncertainty equations are derived from a simplified compressor data reduction code and applied to a typical set of experimental data.