Patent ID: 8403621

Claim:
A method for controlling a fluid-flow machine, comprising: controlling an angle of attack of at least one variable blade row of the fluid-flow machine based on both an aerodynamic speed and at least one further quantity pertinent to a position of an actual operating point in a family of characteristics of the fluid-flow machine; setting a degree of throttling of the at least one variable blade row based on the operating point at a given aerodynamic speed; defining the degree of throttling based on at least one factor from the following group of factors, consisting of: a β-value of the fluid-flow machine, the β-value being a line from a β map; a value of a reduced outlet mass flow of the fluid-flow machine; a value of a total temperature ratio of the fluid-flow machine; a value of a total temperature ratio of a gas turbine; a value of a corrected thrust-specific fuel mass flow of a gas turbine; and a function of a time rate of change of a fuel mass flow DKDT =d(m KS )/d t of a gas turbine.