Abstract: A method for increasing stator cooling airflow in an air cooled electric motor is provided, wherein the air cooled electric motor includes a compressor outlet housing having a motor cavity separator wall and a separator plate defining a separator plate opening, wherein the compressor outlet housing defines a separator plate cavity and a compressor rotor back-face cavity configured to receive a back-face cavity airflow. The motor cavity separator wall separates the separator plate cavity from the compressor rotor back-face cavity and defines a motor cavity separator wall through-hole which communicates the separator plate cavity with the compressor rotor back-face cavity and a motor cooling housing including a motor cooling outlet structure which defines a stator outlet cavity, wherein the separator plate is disposed to separate the stator outlet cavity from the separator plate cavity.

Abstract: According to some embodiments of the present disclosure, an aircraft electric motor is disclosed. The motor includes a rotor comprising a plurality of magnet segments arranged on a frame of the rotor. The motor also includes an output shaft operably coupled to the rotor radially inward from the plurality of magnet segments and a stator. The stator includes a radially outer rim and at least one winding wrapped about a plurality of stator teeth. The stator is arranged around the rotor and includes cooling fins extending radially outward from the radially outer rim. The cooling fins include wide fins that have a width ww distributed about the radially outer rim and thin fins that have width wt. The thin fins are disposed between the wide fins. The width of the wide fins ww is greater than the width wt of the thin fins.

Abstract: A rotor includes a base member including a first side, a second side opposite the first side, and a central opening passing through the first side and the second side. The second side includes an outer circumferential edge having a first dimension and the central opening having an inner circumferential edge having a second dimension. A plurality of blades extend outwardly from the first side. The plurality of blades extend about the central opening. A fuse element is formed in the second side and extends along one of a radial direction and a circumferential direction. The fuse element has a length that is less than the first dimension.

Abstract: A shrouded impeller includes an impeller having a plurality of blades and configured to rotate about an axis, and a shroud disposed adjacent to the impeller and configured to corotate about the axis with the impeller and translate axially relative to the impeller. A method of varying a geometry of a flow area of the shrouded impeller includes rotating the shroud and the impeller about the axis and axially translating the shroud relative to the impeller to increase or decrease a rate of flow between the shroud and the impeller.

Abstract: A rotor includes a base member including a first side, a second side opposite the first side, and a central opening passing through the first side and the second side. The second side includes an outer circumferential edge having a first dimension and the central opening having an inner circumferential edge having a second dimension. A plurality of blades extend outwardly from the first side. The plurality of blades extend about the central opening. A fuse element is formed in the second side and extends along one of a radial direction and a circumferential direction. The fuse element has a length that is less than the first dimension.

Abstract: An integrally bladed rotor includes a rotor disk, rotor blade, internal channel and air outlets. The rotor blade includes a body defined by a pressure surface and suction surface between a leading edge and a trailing edge. The internal channel extends radially from the rotor disk internally within the body of the rotor blade. The air outlets are formed proximate the leading edge and extend within the body of the rotor blade to the internal channel.

Abstract: An integrally bladed rotor includes a rotor disk, rotor blade, internal channel and air outlets. The rotor blade includes a body defined by a pressure surface and suction surface between a leading edge and a trailing edge. The internal channel extends radially from the rotor disk internally within the body of the rotor blade. The air outlets are formed proximate the leading edge and extend within the body of the rotor blade to the internal channel.

Abstract: A rotor includes a base member including a first side, a second side opposite the first side, and a central opening passing through the first side and the second side. The second side includes an outer circumferential edge having a first dimension and the central opening having an inner circumferential edge having a second dimension. A plurality of blades extend outwardly from the first side. The plurality of blades extend about the central opening. A fuse element is formed in the second side and extends along one of a radial direction and a circumferential direction. The fuse element has a length that is less than the first dimension.

Abstract: A shrouded impeller includes an impeller having a plurality of blades and configured to rotate about an axis, and a shroud disposed adjacent to the impeller and configured to corotate about the axis with the impeller and translate axially relative to the impeller. A method of varying a geometry of a flow area of the shrouded impeller includes rotating the shroud and the impeller about the axis and axially translating the shroud relative to the impeller to increase or decrease a rate of flow between the shroud and the impeller.

Abstract: An additively-manufactured heat exchanger header defines a build plane and a vertical axis defining a build direction that is orthogonal to the build plane. The additively-manufactured heat exchanger header includes a header body that at least partially contains a working fluid, and an upper support structure on the header body. The upper support structure defines an interior edge and includes a branchwork of gussets rising upward and outward from a root point located in the middle region on the header body. The header body defines a middle region, an upper region, and a top extension. The branchwork of gussets forms a number of top vanes, each supporting the top extension. The upper region is oriented over the middle region relative to the vertical axis, and the top extension partially defines the fluid boundary and is oriented over the upper region.

Abstract: An additively-manufactured heat exchanger header defines a build plane and a vertical axis defining a build direction that is orthogonal to the build plane. The additively-manufactured heat exchanger header includes a header body that at least partially contains a working fluid, and an upper support structure on the header body. The upper support structure defines an interior edge and includes a branchwork of gussets rising upward and outward from a root point located in the middle region on the header body. The header body defines a middle region, an upper region, and a top extension. The branchwork of gussets forms a number of top vanes, each supporting the top extension. The upper region is oriented over the middle region relative to the vertical axis, and the top extension partially defines the fluid boundary and is oriented over the upper region.

Abstract: A heat exchanger includes a first layer, a second layer, and a third layer. The first layer includes a first width W1 extending in a first direction and a first length L1 extending in a second direction. The second layer includes a second length L2 extending in the first direction and a second width W2 extending in the second direction. The third layer includes a third width W3 extending in the first direction and a third length L3 extending in a second direction. The second layer is between the first layer and the third layer. The first length L1 of the first layer and the third length L3 of the third layer both extend further in the second direction than the second width W2 of the second layer. The first layer and the third layer include an overhang.