Patent ID: 8043052

Claim:
A fluid flow engine comprising: at least one guide vane row with a plurality of guide vanes; at least one rotor blade row having a plurality of rotor blades; one guide vane row and one rotor blade row following said one guide vane row directly downstream with respect to a working gas flow together forming a stage of the fluid flow engine; wherein, in at least at one stage, the guide vanes and the rotor blades are configured and arranged so that, in a reference relative position of the respective guide vane and the respective rotor blade, an axial distance B axially measured with respect to a rotational axis of a rotor of the fluid flow engine, and a circumferential distance C circumferentially measured with respect to the rotational axis of the fluid flow engine between an outgoing flow edge of the respective guide vane and an oncoming flow edge of the respective rotor blade, vary along a radially measured height H of a gas path running axially between blade rows of said at least one stage; and wherein the axial distance B and the circumferential distance C vary according to a second-order polynomial.