Partial change of the flow channel cross section of a closed flow channel cross section

摘要

A wall structure forms a fluid flow channel and includes a deformable multi-wall area for varying a cross-section of the flow channel. The wall structure comprises a homogeneous material. The wall structure is made by sequentially applying layers of a material to one another such that in a region of the wall structure corresponding to the multi-wall area layers do not adhere to one another, to form individual walls disposed adjacent one another in the direction of the thickness of the wall structure.