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. <EOS>