| 摘要 |
The invention relates to a cooled wall structure for the hot gas parts of a gas turbine, especially for a combustion chamber, comprising a sandwich panel (23) with a base plate (19), which is exposed with a hot side (18) to hot gas of the gas turbine and is covered on a side opposite to the hot side by a covering layer (20), whereby a cooling channel (21) for guiding a cooling fluid, especially cooling air, extends parallel to the base plate (19) between the base plate (19) and the covering layer (20). An enhanced heat transfer coefficient is achieved without causing a substantial increase in pressure drop by providing micro-structures (22a,b) for enhancing heat transfer between a cooling fluid passing the cooling channel (21) and the base plate (19) in the cooling channel (21), and having the micro-structures (22a,b) made by an additive manufacturing process. |
