Swirler assembly

Abstract

A swirler assembly includes a casing, a support shaft provided in the casing, and a blade provided on an outer circumferential surface of the support shaft and generating a first flow swirling around the support shaft during flow of a fluid in an axial direction of the support shaft. The casing includes an injection portion that penetrates through an outer surface of the casing to connect an interior of the casing to an exterior of the casing and generates a second flow flowing in a tangential direction in which the fluid swirls along an inner surface of the casing in the axial direction of the support shaft.

1 . A swirler assembly comprising:
 a casing;   a support shaft provided in the casing; and   a blade provided on an outer circumferential surface of the support shaft and generating a first flow swirling around the support shaft during flow of a fluid in an axial direction of the support shaft,   wherein the casing comprises an injection portion that penetrates through an outer surface of the casing to connect an interior of the casing to an exterior of the casing and generates a second flow flowing in a tangential direction in which the fluid swirls along an inner surface of the casing in the axial direction of the support shaft.   
     
     
         2 . The swirler assembly of  claim 1 , wherein the casing comprises:
 a main body portion;   a first vane connected to the main body portion; and   a second vane connected to the main body portion by at least partially overlapping the first vane,   wherein the injection portion is provided by a portion of the second vane overlapping the first vane and spaced apart from the first vane.   
     
     
         3 . The swirler assembly of  claim 2 , wherein the casing further comprises a leak prevention portion formed in a portion where the first vane and the second vane overlap each other and preventing leakage of the fluid injected into the injection portion. 
     
     
         4 . The swirler assembly of  claim 1 , wherein the injection portion is provided in plural in the casing, and the plurality of injection portions are formed in the casing in a radial direction with respect to the support shaft. 
     
     
         5 . The swirler assembly of  claim 4 , wherein at least two of the plurality of injection portions are formed in the casing to face each other. 
     
     
         6 . The swirler assembly of  claim 1 , further comprising a flow rate regulator that regulates an amount of the fluid injected into the injection portion.