| 摘要 |
<p>The present invention relates to a cooled wall segment in the hot gas path of a gas turbine, particularly relates to a stator heat shielding part in the hot gas path of a gas turbine. Such parts should be cooled properly in order to avoid damage by heat of such parts and guarantee sufficient life. A wall segment, according to the present invention comprises at least: a first surface (11) exposed to a medium of relatively high temperature; a second surface (12) exposed to a medium of relatively low temperature; side surfaces (13) which connects the first and the second surfaces (11, 12) and regulates a height of the wall segment (10); and at least one cooling channel (14, 14′, 14″) for flow-through of a fluid cooling medium (15) extended through the wall segment (10), wherein in each cooling channel (14, 14′, 14″) is equipped with an inlet (16) for the cooling medium (15) and an outlet (17) for the cooling medium (15), at least one cooling channel (14, 14′, 14″) includes at least two heat transfer sections (18, 22), a first (in a flow direction of the cooling medium (15)) heat transfer section (18) extends surely in parallel with a surface (11) of relatively high temperature at a first distance (19), a second heat transfer section (22) extends surely in parallel with a surface (11) of relatively high temperature at a second distance (23), and the second distance (23) is shorter than the first distance (19).</p> |
