Turbine engine scroll for use with an internal combustion engine

An assembly, comprising:

• a turbine scroll comprising:
• a flowpath extending between a scroll inlet and a scroll outlet;
• an outer flow channel extending circumferentially about and radially along a center axis, the outer flow channel including an outer radial wall forming an outer peripheral boundary of the flowpath;
• a plurality of scroll stator vanes distributed circumferentially about the center axis, the plurality of scroll stator vanes extending radially within the flowpath to the outer flow channel, the plurality of scroll stator vanes including a first scroll stator vane and a second scroll stator vane;
• a vane passage extending axially between the first scroll stator vane and the second scroll stator vane, the vane passage extending radially between the outer flow channel and an annular collection region, and the vane passage configured to direct gas flow along the flowpath to the annular collection region;
• and
• the annular collection region disposed radially inward of the plurality of scroll stator vanes, the annular collection region extending circumferentially about and axially along the center axis, and the annular collection region configured to receive gas flow from vane passage;
• and
• a turbine stator vane assembly coupled with the scroll outlet, the turbine stator vane assembly including a plurality of turbine stator vanes distributed circumferentially about the center axis.

An engine assembly, comprising:

• a rotary engine including a plurality of rotary units in communication with one another, each rotary unit having an exhaust port;
• an exhaust manifold connected to the exhaust port of each rotary unit, the exhaust manifold configured to receive a periodic flow of combustion gases from each exhaust port during operation of the engine;
• a turbine scroll in fluid communication with the exhaust manifold and configured to receive the periodic flow of combustion gases, the turbine scroll comprising:
• a flow channel defined by an outer radial wall extending between a first axial sidewall and a second axial sidewall, the first axial sidewall and second axial sidewall spaced widthwise apart from one another, the flow channel extending circumferentially around a center axis;
• a scroll inlet configured to permit gas flow into the flow channel;
• a plurality of scroll stator vanes disposed within the flow channel, spaced apart from one another and disposed around a circumference of the scroll;
• and
• a plurality of vane passages, each vane passage defined between adjacent said scroll stator vanes of the plurality of scroll stator vanes, each vane passage is open to an outer flow channel portion of the flow channel disposed radially between the scroll stator vanes and the outer radial wall and is open to an annular region disposed radially inside of the plurality of scroll stator vanes, the vane passages configured to direct gas flow in an inwardly spiraling direction having a radially inward component and a circumferential component;
• the annular region disposed radially inboard of the plurality of scroll stator vanes and configured to receive gas flow from the plurality of vane passages;
• and
• an axial turbine configured to receive gas flow from the turbine scroll.