Analysis of Turbocharger Non-Adiabatic Performance

Turbocharging is nowadays the most commonly used method of engine supercharging. One of the important factors affecting the turbocharger performance is the heat transfer inside the turbocharger and from the turbocharger to the ambient. Heat transfer takes place due to the high temperature gradient between the turbine and the other components of the turbocharger as well as between the turbine and the ambient. This heat transfer causes underestimation of the measured compressor efficiency and overestimation of the turbine efficiency. This results in an inaccurate estimation of the compressor power and the turbine power. The complex turbocharger geometry introduces many geometrical and operating parameters that affect the turbocharger non-adiabatic performance. The purpose of the present paper is to analyse the turbocharger non-adiabatic performance and define the parameters affecting this performance. It also helps to understand and estimate the effect of each parameter on the turbocharger non-adiabatic performance.