Wheel of a fluid flow machine

A blade wheel of a turbomachine, which blade wheel has:

• a multiplicity of guide blades which are suitable and provided for extending in a flow path of the turbomachine, which flow path is delimited radially at the outside by an outer flow path boundary and radially at the inside by an inner flow path boundary, wherein the guide blades are designed to be adjustable in terms of their stagger angle,
• wherein the guide blades have first partial gaps with respect to the outer flow path boundary and/or second partial gaps with respect to the inner flow path boundary,
• wherein the first partial gaps and the second partial gaps in each case extend not over the entire axial length of the guide blades but only over a partial length,
• wherein
• the blade wheel forms N blocks of blades, where N≥2, wherein
• the guide blades of a block have in each case identically formed partial gaps, and
• the guide blades of at least two mutually adjacent blocks have differently formed partial gaps.