Patent ID: 11905892
Assignee: ROLLS-ROYCE PLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 0:
1. A method of determining performance characteristics of a flow machine having a rotor interacting with a flow field, the method comprising:
receiving performance data for the flow machine comprising data values of a performance parameter of the rotor and mass flow for the flow machine at one or more defined rotor condition, the performance data defining a two-dimensional array of data in which points for a common rotor condition are identifiable;
determining or receiving exit mass flow values for the flow downstream of the rotor; and
identifying one or more point in the received performance data and interpolating from the one or more point to a corresponding one or more point at a sub-idle rotor condition based on a correlation of the exit mass flow values for the points.