Patent ID: 8070440
Filing Date: 2011-12-06
Classification: B23H,F01D,Y02T,Y10T

Abstract:
1. A wall element having at least one cooling channel formed therein, said wall element presenting an inside surface and an outside surface suitable for being cooled by cool gas flowing in said channel, the channel comprising a hole and a diffusion portion, the hole opening out at one end into the inside surface, and at its other end, into a diffusion portion by forming an orifice, the diffusion portion flaring around said orifice and being defined by a bottom wall and a side margin, wherein said bottom wall presents a first plane portion into which the hole opens out, and a second plane portion situated at the front of the first plane portion in the flow direction of the cool gas, said first and second plane portions being inclined in the thickness of the wall in such a manner that, in the midplane of the diffusion portion containing the axis of the hole, a first angle measured between the tangent to the outside surface at the point of intersection between the outside surface and the second plane portion and the first plane portion, and a second angle measured between said tangent and the second plane portion are such that the first angle oriented from said tangent towards said first plane portion is algebraically less than the second angle oriented positive from said tangent towards said second plane portion, in such a manner that the angle between the second plane portion and the first plane portion as measured in said midplane lies, in absolute value, in the range 130° to 170°.