US 10,890,328 B2
Fin-pin flow guide for efficient transition piece cooling
Jung Jin Choi, Palm Beach Gardens, FL (US); Yunyoung Doh, Gyeongnam (KR); and Donggon Lee, Seoul (KR)
Assigned to Doosan Heavy Industries Construction Co., Ltd, Gyeongsangnam-do (KR)
Filed by DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD., Changwon-si (KR)
Filed on Nov. 29, 2018, as Appl. No. 16/204,709.
Prior Publication US 2020/0173294 A1, Jun. 4, 2020
Int. Cl. F23R 3/26 (2006.01); F01D 9/02 (2006.01)
CPC F23R 3/26 (2013.01) [F01D 9/023 (2013.01); F23R 2900/03043 (2013.01); F23R 2900/03045 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A transition piece, comprising:
an inner transition piece including an inlet and an outlet and having a center line representing an imaginary line between an inlet center of the inlet and an outlet center of the outlet;
an outer transition piece surrounding the inner transition piece to form a flow passage in which cooling air flows between the inner transition piece and the outer transition piece; and
a plurality of fin-pin flow guides disposed in the flow passage and configured to redirect and redistribute a flow of the cooling air in the flow passage, each of the plurality of fin-pin flow guides formed of a symmetric arrangement of fin-pins having opposite slants with respect to the center line, the plurality of fin-pin flow guides including:
an outlet fin-pin flow guide located closer to the outlet than the inlet,
a bottom fin-pin flow guide disposed at a bottom portion of the inner transition piece, and
a side fin-pin flow guide disposed at a side portion of the inner transition piece and configured to guide the flow of the cooling air from the bottom fin-pin flow guide to the outlet fin-pin flow guide.