Nozzle for partitioned volute

Abstract

The disclosed assembly includes an exhaust gas turbine housing having inner and outer walls defining first and second exhaust gas channels to a turbine wheel space where an inner wall includes an inner wall end and an outer wall includes an outer wall end, both at the turbine wheel space. A first flow body is disposed adjacent to the inner wall end. A second flow body is disposed adjacent to the outer wall end. At least one set of adjustable variable geometry nozzle vanes define nozzle throats that direct flow of exhaust gas from at least one of the exhaust gas channels to the turbine wheel space At least one of the first flow body and the second flow body includes a concave trailing surface defined in part by an extension of an airfoil surface.