Preliminary Calculation of a Centripetal Turbine
Radial inflow turbines for turbocharging - Modelisation

To determine the type of turbine best suited to a given set of specifications, it is necessary to perform a brief preliminary calculation. Depending on the turbine’s application, the conditions at the turbine inlet and outlet will be more or less known.

In what follows, we will consider the case of supercharging automotive internal combustion engines, a common application for centripetal turbines. In this case, the turbine is driven directly by a centrifugal compressor that uses the hot exhaust gases from the cylinders. At the rated operating point, for which the turbine must be designed, the following parameters are generally available:

• mass flow rate of the exhaust gases $q_{\mathrm{m}}$ ;

• stopping...