A turbomachine system

摘要

A turbomachine system comprises a first turbocharger comprising an exhaust gas flow first turbine for location in an exhaust path and a first compressor driven by said first turbine; a turbomachine for location in the exhaust path upstream or downstream of said first turbocharger and comprising an exhaust gas flow second turbine and a second compressor driven by said second turbine. The first turbine has an outlet that is in fluid communication with an inlet of the second turbine. One of said first and second turbines is a radial outflow turbine. The arrangement provides for a relatively compact package. The radial outflow turbine may have a particular structure in which there is provided a deflector member (50) at or near its inlet for directing the gas outwards, a stator (51) for introducing swirl and a downstream turbine rotor. A shroud (61) is fixed to blades of the turbine rotor to prevent leakage and to provide additional structural rigidity.