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The invention relates to an impact flow for wall sections including a plurality of impact openings which are arranged on a plane in a flat or curved support. The support is fitted it a distance from the wall section, and the impact surface of the wall section that is to be cooled is configured as a

The invention relates to an impact flow for wall sections including a plurality of impact openings which are arranged on a plane in a flat or curved support. The support is fitted it a distance from the wall section, and the impact surface of the wall section that is to be cooled is configured as a bulged relief. The bulge elements are arranged around the impact surface of the impact beam. The surfaces of the bulge elements facing the impact beam include two curves which blend into one another.

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1. An arrangement for a wall section to be impacted by an impact stream, said arrangement comprising: a plurality of impact openings arranged on a plane in a flat or curved support, with said support being arranged at a distance from the wall section; wherein the wall section includes an impact surf

1. An arrangement for a wall section to be impacted by an impact stream, said arrangement comprising: a plurality of impact openings arranged on a plane in a flat or curved support, with said support being arranged at a distance from the wall section; wherein the wall section includes an impact surface to be cooled or heated and is constructed as a relief with bulge elements, wherein the bulge elements are rotationally symmetric bodies whose forming curve includes first and second curvature sections that merge with each other; and wherein the bulge elements are arranged around the impact surface of the impact stream.