Patent ID: 8105025

Claim:
A collecting chamber of a turbomachine, which widens in the circumferential direction and extends over at least part of the circumference of a machine axis, comprising: an outer shell part; and a contour insert, which includes a groove, milled from a solid unit and extends in the circumferential direction and is laterally delimited on a side and includes a groove base; a first flow opening, which extends in the circumferential direction and is formed substantially for axial flows; and a second flow opening, which is formed substantially for radial flows, wherein the groove has a first end in the circumferential direction and a second end in the circumferential direction, wherein the second end in the circumferential direction issues into the second flow opening, wherein the groove base includes a first circumferential cm ion, which comprises the first end, and an adjoining, second circumferential portion, which comprises the second end, and wherein the groove base includes an increase in a curvature which is concave in an axial direction as a distance from the second end becomes smaller wherein a cross section of the groove in a first region is essentially rectangular.