| 摘要 |
PURPOSE: A transition piece assembly for a gas turbine and a cooling method in impingement of a transition duct are provided to cut down installation expenses, and to install conveniently by cooling the side panel partially and additionally. CONSTITUTION: A transition piece assembly for a gas turbine includes a transition duct having one end adapted for connection to a gas turbine combustor and the opposite end adapted for connection to a first turbine stage, and a pair of side panels. The transition piece assembly has an impingement sleeve(122) surrounding the transition duct and establishing a cooling path. The impingement sleeve is formed with plural rows of cooling holes(120) therein, and plural flow catcher devices(26) are formed on the external surface of the impingement sleeve. Each flow catcher device partially surrounds at least one of the cooling holes.
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