Conjugate Heat Transfer Analysis of a Centrifugal Compressor for Turbocharger Applications

Harald Roclawski , Claus Oberste-Brandenburg , Martin Böhle (1)

1 TU Kaiserslautern - Technical University of Kaiserslautern

For 2-stage turbocharging, high inlet temperatures to the high compressor stage represent an additional load for the compressor wheel which must be taken into account in the design process of the compressor. In this paper, a heat transfer analysis of a high pressure compressor for commercial vehicle applications is presented. Simulations were run with a conjugate heat transfer model. For the simulations, only the compressor side of the turbocharger is modeled. Bearing housing and turbine stage are considered by choosing appropriate thermal boundary conditions at the suitable interfaces. The simulations were validated with experiments run on a gas stand. For the experiments, temperature was measured by means of a telemetry system on seven locations in the compressor wheel and on the compressor housing. The results are discussed for two operating points with different compressor inlet temperatures.

Mots clés: radial compressor; CHT simulation; turbocharger

Domaines: Mécanique [physics]

Harald Roclawski, Claus Oberste-Brandenburg, Martin Böhle. Conjugate Heat Transfer Analysis of a Centrifugal Compressor for Turbocharger Applications. 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Apr 2016, Honolulu, United States. ⟨hal-01884259⟩