Exhaust stack with baffles

Abstract

An exhaust stack is disclosed for protecting exhaust system components from liquid entering an exhaust stack discharge port. The exhaust stack includes a first section defining a first flow passage extending along a first longitudinal axis and a second section having an open end and defining a second flow passage extending along a second longitudinal axis. The exhaust stack further includes a liquid drain disposed in the first section and one or more baffles disposed in the second flow passage, wherein the one or more baffles are configured to block line-of-sight between the open second end and any inner surface below the liquid drain

1 . An exhaust stack, comprising:
 a first section defining a first flow passage extending along a first longitudinal axis;   a second section defining a second flow passage extending along a second longitudinal axis, the second flow passage in fluid communication with the first flow passage, the second longitudinal axis extending at an angle to the first longitudinal axis, the second section having an open end;   a liquid drain disposed in the first section; and   one or more baffles disposed in the second flow passage, wherein the one or more baffles are configured to block line-of-sight between the open end and any inner surface below the liquid drain.   
     
     
         2 . The exhaust stack of  claim 1  wherein the liquid drain extends around a circumference of an inner surface of the first section. 
     
     
         3 . The exhaust stack of  claim 2  wherein the liquid drain includes an aperture configured to direct liquid from the liquid drain to an exterior surface of the first section. 
     
     
         4 . The exhaust stack of  claim 1  wherein the one or more baffles do not extend over the first flow passage. 
     
     
         5 . The exhaust stack of  claim 1  wherein the open end terminates in a plane substantially parallel with the first longitudinal axis. 
     
     
         6 . The exhaust stack of  claim 1  wherein the one or more of baffles include a plurality of baffles that are substantially parallel to each other. 
     
     
         7 . The exhaust stack of  claim 1  wherein the one or more baffles extend in a direction substantially parallel to the second longitudinal axis. 
     
     
         8 . The exhaust stack of  claim 1  wherein the one or more baffles are configured such that liquid falling by gravity from the one or more baffles will contact an inner surface of the exhaust stack between the liquid drain and the one or more baffles. 
     
     
         9 . The exhaust stack of  claim 1  wherein the one or more baffles include a body portion and a lip extending from the body portion, the lip configured to route liquid to an inner surface of the exhaust stack between the liquid drain and the one or more baffles. 
     
     
         10 . A power system, comprising:
 an engine;   an exhaust manifold configured to receive exhaust from the engine;   an exhaust stack configured to receive exhaust from the exhaust manifold, the exhaust stack comprising:
 a first section defining a first flow passage extending along a first longitudinal axis; 
 a second section defining a second flow passage extending along a second longitudinal axis, the second flow passage in fluid communication with the first flow passage, the second longitudinal axis extending at an angle to the first longitudinal axis, the second section having an open end; 
 a liquid drain disposed in the first section; 
 one or more baffles disposed in the second flow passage, wherein the one or more baffles are configured to block line-of-sight between the open end and any inner surface below the liquid drain. 
   
     
     
         11 . The power system of  claim 10  wherein the liquid drain extends around a circumference of an inner surface of the first section. 
     
     
         12 . The power system of  claim 11  wherein the liquid drain includes an aperture configured to direct liquid from the liquid drain to an exterior surface of the first section. 
     
     
         13 . The power system of  claim 10  wherein the one or more baffles do not extend over the first flow passage. 
     
     
         14 . The power system of  claim 10  wherein the open end terminates in a plane substantially parallel with the first longitudinal axis. 
     
     
         15 . The power system of  claim 10  wherein the one or more of baffles include a plurality of baffles that are substantially parallel to each other. 
     
     
         16 . The power system of  claim 10  wherein the one or more baffles extend in a direction substantially parallel to the second longitudinal axis. 
     
     
         17 . The power system of  claim 10  wherein the one or more baffles are configured such that liquid falling by gravity from the one or more baffles will contact an inner surface of the exhaust stack between the liquid drain and the one or more baffles. 
     
     
         18 . The power system of  claim 10  wherein the one or more baffles include a body portion and a fin extending from the body portion, the fin configured to route liquid to an inner surface between the liquid drain and the one or more baffles. 
     
     
         19 . A method of protecting exhaust system components from liquid entering an exhaust stack discharge port, comprising:
 providing a liquid drain along an exhaust flow path in the exhaust stack;   blocking line-of sight between the exhaust stack discharge port and any inner surface of the exhaust system below the liquid drain;   positioning one or more baffles in the exhaust stack such that liquid falling by gravity from the one or more baffles will contact an inner surface of the exhaust stack between the liquid drain and the one or more baffles.   
     
     
         20 . The method of  claim 19  further comprising collecting liquid that flows down the inner surface of the exhaust stack and transporting the collected liquid to an exterior of the exhaust stack.