A nozzle assembly comprising: an inner tube terminating at an outlet end and defining a first flow passage open to the outlet end for directing a first fluid flow to the outlet end in a primary flow direction; and an outer housing including a tubular side wall and an end wall, wherein the outer housing defines opposing, first and second sides, wherein the end wall is located at the first side, wherein the tubular side wall defines a central axis, and further wherein the end wall defines an exit orifice and an interior guide structure, wherein the end wall includes a guide surface and a guide post, wherein the interior guide structure includes the guide surface and the guide post, wherein the guide surface extends radially inwardly from the tubular side wall, wherein the guide post is radially spaced from the tubular side wall and projects from the guide surface in a direction of the second side, wherein the guide post terminates at a post end opposite the guide surface, and wherein an axial distance between the outlet end and the guide surface is greater than an axial distance between the outlet end and the post end; wherein the inner tube is assembled to the outer housing such that the outlet end is axially aligned with the exit orifice and such that a segment of the inner tube, including the outlet end, is radially within the tubular side wall to establish a second flow passage between the inner tube and the outer housing; and further wherein the interior guide structure is configured and arranged relative to the outlet end to direct at least a portion of a second fluid flow from the second flow passage toward the outlet end in a direction opposite the primary flow direction for mixing the first and second fluid flows. an inner tube terminating at an outlet end and defining a first flow passage open to the outlet end for directing a first fluid flow to the outlet end in a primary flow direction; and an outer housing including a tubular side wall and an end wall, wherein the outer housing defines opposing, first and second sides, wherein the end wall is located at the first side, wherein the tubular side wall defines a central axis, and further wherein the end wall defines an exit orifice and an interior guide structure, wherein the end wall includes a guide surface and a guide post, wherein the interior guide structure includes the guide surface and the guide post, wherein the guide surface extends radially inwardly from the tubular side wall, wherein the guide post is radially spaced from the tubular side wall and projects from the guide surface in a direction of the second side, wherein the guide post terminates at a post end opposite the guide surface, and wherein an axial distance between the outlet end and the guide surface is greater than an axial distance between the outlet end and the post end; wherein the inner tube is assembled to the outer housing such that the outlet end is axially aligned with the exit orifice and such that a segment of the inner tube, including the outlet end, is radially within the tubular side wall to establish a second flow passage between the inner tube and the outer housing; and further wherein the interior guide structure is configured and arranged relative to the outlet end to direct at least a portion of a second fluid flow from the second flow passage toward the outlet end in a direction opposite the primary flow direction for mixing the first and second fluid flows.